關(guān)于五年級(jí)上冊(cè)數(shù)學(xué)計(jì)算題100道口算，五年級(jí)上冊(cè)數(shù)學(xué)計(jì)算題100道這個(gè)問題很多朋友還不知道，今天小六來為大家解答以上的問題，現(xiàn)在讓我們一起來看看吧！
1、30.8÷[14－(9.85＋1.07)] [60－(9.5＋28.9)]÷0.18 2.881÷0.43－0.24×3.5 20×[(2.44－1.8)÷0.4＋0.15] 28-(3.4+1.25×2.4) 2.55×7.1+2.45×7.1 777×9+1111×3 0.8×〔15.5-(3.21+5.79)〕 （31.8+3.2×4）÷5 31.5×4÷(6+3) 0.64×25×7.8+2.2 2÷2.5+2.5÷2 194－64.8÷1.8×0.9 36.72÷4.25×9.9 5180－705×6 24÷2.4－2.5×0.8 (4121+2389)÷7 671×15-974 469×12+1492 405×(3213-3189) 3.416÷（0.016×35） 0.8×[(10－6.76)÷1.2] 19.4×6.1×2.3 5.67×0.2-0.62 18.1×0.92+3.93 0.0430.24+0.875 0.4×0.7×0.25 0.75×102 100-56.23 0.78+5.436+1 4.07×0.86+9.12.5 30.8÷[14－(9.85＋1.07)] [60－(9.5＋28.9)]÷0.18 2.881÷0.43－0.24×3.5 20×[(2.44－1.8)÷0.4＋0.15] 28-(3.4+1.25×2.4) 2.55×7.1+2.45×7.1 777×9+1111×3 0.8×〔15.5-(3.21+5.79)〕 （31.8+3.2×4）÷5 31.5×4÷(6+3) 0.64×25×7.8+2.2 2÷2.5+2.5÷2 194－64.8÷1.8×0.9 36.72÷4.25×9.9 5180－705×6 24÷2.4－2.5×0.8 (4121+2389)÷7 671×15-974 469×12+1492 405×(3213-3189) 3.416÷（0.016×35） 0.8×[(10－6.76)÷1.2] 19.4×6.1×2.3 5.67×0.2-0.62 18.1×0.92+3.93 0.0430.24+0.875 0.4×0.7×0.25 0.75×102 100-56.23 0.78+5.436+1 4.07×0.86+9.12.5脫式計(jì)算題：1. 3/7 × 49/9 - 4/3=7/3-4/3=3/3=12. 8/9 × 15/36 + 1/27=10/27+1/27=11/273. 12× 5/6 – 2/9 ×3=10-2/3=30/3-2/3=28/34. 8× 5/4 + 1/4=10+1/4=40/4+1/4=41/45. 6÷ 3/8 – 3/8 ÷6=6*8/3-3/8*1/6=16-1/16=155/166. 4/7 × 5/9 + 3/7 × 5/9=1/7*（4*5/9+3）=1/7*47/9=47/637. 5/2 -（ 3/2 + 4/5 ）=5/2-3/2-4/5=1-4/5=5/5-4/5=1/58. 7/8 + （ 1/8 + 1/9 ）=7/8+1/8+1/9=1+1/9=10/99. 9 × 5/6 + 5/6=（9+1）*5/6=50/610. 3/4 × 8/9 - 1/3=（3/4*8/3-1）*1/3=1*1/3=1/311. 7 × 5/49 + 3/14=（7*5/7+3/2）*1/7=13/1412. 6 ×（ 1/2 + 2/3 ）=3+4=713. 8 × 4/5 + 8 × 11/5=8*（4/5+11/5）=8*3=2414. 31 × 5/6 – 5/6=（31-1）*5/6=2515. 9/7 - （ 2/7 – 10/21 ）=9/7-2/7+10/21=1+10/21=31/211）25%*132+1/4*8 2)32*0.125*25 =1/4*132+1/4*8 =(4+8)*0.125*25 =1/4*(132+8) =(4*25)*(8*0.125) =1/4*140 =100*1 =35 =1000 3)75%*76+25*4+0.75*12 =3/4*76+3/4*12+25*4 =3/4*88+100 =166 4)3200*1/8÷2/5+1270 5)(2/3+4/5)*7/6 =400*5/2+1270 =22/15*7/6 =1000+1270 =77/45 =2270 5)6*(1/2+2/3) 6)132*(44÷176) =6*1/2+6*2/3 =132*1/4 =33 =3+4 =7（46＋28）×60 = 74 x 60 = 444042×50－17 = 2100- 17 = 208332＋105÷5 = 32 + 21 = 53420×（327－238） = 420 x 89 = 37380(4121+2389)÷7 = 6510 ÷7 = 9303.416÷（0.016×35） = 3.416 ÷0.56 = 6.10.8×[(10－6.76)÷1.2] = 0.8 x(3.24÷1.2) = 0.8 x 2.7 = 2.165.67×0.2-0.62 = 1.134-0.62 = 0.5140.4×0.7×0.25 = 0.4 x 0.25 x 0.7 = 0.1 x 0.7 = 0.070.78+5.436+1 = 6.216 +1 = 7.21630.8÷[14－(9.85＋1.07)] = 30.8 ÷ (14 - 10.92) = 30.8÷3.08 = 10[60－(9.5＋28.9)]÷0.18 = (60- 38.4)÷0.18 = 21.6 ÷0.18 = 1202.881÷0.43－0.24×3.5 = 6.7 - 0.24 x3.5 = 6.7 - 0.84 = 5.8620×[(2.44－1.8)÷0.4＋0.15] = 20x (0.64 ÷0.4 +0.15)= 20x(1.6 +0.15) = 20 x1.75 = 3528-(3.4+1.25×2.4) = 28 - (3.4 + 3) = 28 - 6.4 = 21.62.55×7.1+2.45×7.1 = (2.55 + 2.45) x7.1 = 5 x7.1=35.50.8×〔15.5-(3.21+5.79)〕 = 0.8 x (15.5 - 9) = 0.8 x 6.5 = 5.2（31.8+3.2×4）÷5 = (31.8 + 12.8)÷5 = 44.6÷5 = 8.9231.5×4÷(6+3) = 126 ÷ 9 = 142÷2.5+2.5÷2 = 0.8 + 1.25 =2.05194－64.8÷1.8×0.9 = 194 -36 x0.9 = 194-32.4 = 161.65180－705×6 = 5180 - 4230=95024÷2.4－2.5×0.8 =10 -2=8405×(3213-3189) =405x24 = 9720125×(97-81) =125x16 =20006942+480÷3 = 6942 + 160 = 678220+80÷4-20 = 20 + 20 -20 = 40 -20 = 20100÷（32-30）×0 = 100 ÷2 x0= 50 x0 = 025×4-12×5 = 100 - 60 = 4070×〔（42-42）÷18〕=70 x (0÷18) = 70x0 = 075×65+75×35 = 75 x (65 +35) = 75x100 = 7500 6-1.6÷4= 6- 0.4 = 5.65.38+7.85-5.37= 13.23 - 5.37=7.867.2÷0.8-1.2×5=9 - 6 =36-1.19×3-0.43= 6-3.57 - 0.43 = 6- (3.57 + 0.43) = 6-4 = 26.5×（4.8-1.2×4）= 6.5 x(4.8 - 4.8 )=6.5 x0 = 00.68×1.9+0.32×1.9 = (0.68 + 0.32) x1.9 = 1 x 1.9 = 1.910.15-10.75×0.4-5.7 = 10.15 - 4.3 - 5.7 = 10.15 -(4.3 + 5.7)=10.15 - 10 =0.155.8×（3.87-0.13）+4.2×3.74 = 5.8 x 3.74 +4.2 x 3.74 = (5.8 +4.2)x3.74 = 10 x 3.74 = 37.432.52-（6+9.728÷3.2）×2.5 = 32.52 - (6+3.04)x2.5 = 32.52 - 9.02 x 2.5 = 32.52 -22.55 = 9.97（136+64）×（65-345÷23）= 200x(65-15) = 200x 50=10000（48+370）÷（64-45）=418 ÷19 =2214 × 8/7 – 5/6 × 12/15 =16 - 2/3 = 15x1/317/32 – 3/4 × 9/24 = 17/32 - 27/96= 51/96 - 27 /96 = 24/96 = 1/43 × 2/9 + 1/3 = 2/3 + 1/3 = 15/7 × 3/25 + 3/7 =3/35 + 3/7= 3/35 +15/35= 18/351/5 × 2/3 + 5/6 = 2/15 + 5/6 = 4/30 + 25/30 = 29/309/22 + 1/11 ÷ 1/2 = 9/22+ 1/11 x 2 = 9/22 +2/11 = 9/22 +4/22 = 13/225/3 × 11/5 + 4/3 = 11/3 +4/3 = 15/3 = 545 × 2/3 + 1/3 × 15 = 30+5 = 357/19 + 12/19 × 5/6 =7/19 + 10/19=17/191/4 + 3/4 ÷ 2/3 =1/4+ 1/2 = 1/4 + 2/4 = 3/48/7 × 21/16 + 1/2= 3/2+1/2 = 4/2 = 20.4×125×25×0.8 =(0.4×25)×(125×0.8)=10×100=1000 1.25×(8+10) =1.25×8+1.25×10=10+12.5=22.5 9123-(123+8.8) =9123-123-8.8=9000-8.8=8991.2 1.24×8.3+8.3×1.76 =8.3×(1.24+1.76)=8.3×3=24.9 9999×1001 =9999×(1000+1)=9999×1000+9999×1 =10008999 14.8×6.3-6.3×6.5+8.3×3.7 =(14.8-6.5)×6.3+8.3×3.7=8.3×6.3+8.3×3.7 8.3×(6.3+3.7) =8.3×10 =83 1.24+0.78+8.76 =(1.24+8.76)+0.78 =10+0.78 =10.78 933-157-43 =933-(157+43)=933-200=733 4821-998 =4821-1000+2=3823 ?I32×125×25 =4×8×125×25 =(4×25)×(8×125)=100×1000 =1000009048÷268 =(2600+2600+2600+1248)÷26=2600÷26+2600÷26+2600÷26+1248÷269 =100+100+100+48=3482881÷ 43 =(1290+1591)÷ 434=1290÷43+1591÷43=30+373.2×42.3×3.75-12.5×0.423×16=3.2×42.3×3.75-1.25×42.3×1.6=42.3×(3.2×3.75-1.25×1.6)=42.3×(4×0.8×3.75-1.25×4×0.4)=42.3×(4×0.4×2×3.75-1.25×4×0.4)=42.3×(4x0.4x7.5-1.25x4x0.4)=42.3×[4×0.4×(7.5-1.25)]=42.3×[4×0.4×6.25] =42.3×(4×2.5)=4237 1.8+18÷1.5-0.5×0.3 =1.8+12-0.15=13.8-0.15=13.656.5×8+3.5×8-47 =52+28-47=80-47(80-9.8)×5分之2-1.32 =70.2X2/5-1.32=28.08-1.32=26.768×7分之4÷[1÷(3.2-2.95)]=8×4/7÷[1÷0.25]=8×4/7÷4=8/72700×(506-499)÷900 =2700×7÷900 =18900÷900 =21 33.02-(148.4-90.85)÷2.5=33.02-57.55÷2.5=33.02-23.02 =10(1÷1-1)÷5.1 =(1-1)÷5.1 =0÷5.1 =018.1+(3-0.299÷0.23)×1=18.1+1.7×1 =18.1+1.7 =19.8 ? ? ? ? ? ? ? ? ? ? ?希望可以幫到你！ ?謝謝！6.9＋4.8＋3.1 ? ? ? ? ? ? ?0.456＋6.22＋3.78 ? ? ? ? ?15.89＋(6.75－5.89)4.02＋5.4＋0.98 ? ? ? ? ? 5.17－1.8－3.2 ? ? ? ? ? ? ? 13.75－(3.75＋6.48)3.68＋7.56－2.68 ? ? ? ? ? 7.85＋2.34－0.85＋4.66 ? ? ?35.6－1.8－15.6－7.23.82＋2.9＋0.18＋9.1 ? ? ? 9.6＋4.8－3.6 ? ? ? ? ? ? ? ? 7.14－0.53－2.475.27＋2.86－0.66＋1.63 ? ? 13.35－4.68＋2.65 ? ? ? ? ? 73.8－1.64－13.8－5.3647.8－7.45+8.8 ? ? ? ? ? ?0.398+0.36+3.64 ? ? ? ? ? ?15.75+3.59－0.59+14.2566.86－8.66－1.34 ? ? ? ? ? 0.25×16.2×4 ? ? ? (1.25－0.125)×8 ? ? ? ? ? ? ? ?3.6×102 ? ? ? ? ? ? ? ? ?3.72×3.5＋6.28×3.5 ? ? ? ? 36.8－3.9－6.115.6×13.1－15.6－15.6×2.1 ? ? ? ? 4.8×7.8＋78×0.52 ? ? ? 32＋4.9－0.9 ? ?4.8×100.1 ? ? ? ? ?56.5×9.9＋56.5 ? ? ? ?7.09×10.8－0.8×7.0925.48－(9.4－0.52) ? ? ? ? ? 4.2÷3.5 ? ? ? ? ? ?320÷1.25÷8 ? 18.76×9.9＋18.76 ? ? ? ? 3.52÷2.5÷0.4 ? ? ? 3.9－4.1＋6.1－5.95.6÷3.5 ? ? ? ? ? ? ? ?9.6÷0.8÷0.4 ? ? ? ?4.2×99＋4.2 17.8÷(1.78×4) ? ? ? ? 0.49÷1.4 ? ? ? ? ? 1.25×2.5×32 ? ? ? ? 3.65×10.1 ? ? ? ? ? ? ? ? 15.2÷0.25÷4 ? ? ?0.89×100.1 ? ? ? ? ?146.5－(23＋46.5)3.83×4.56＋3.83×5.44 ? ? ?4.36×12.5×8 ? ? ?9.7×99＋9.7 ?27.5×3.7－7.5×3.7 ? ? ? ? 8.54÷2.5÷0.4 ? ? ? 0.65×101 ? ?3.2×0.25×12.5 ?(45.9－32.7)÷8÷0.125 ? 3.14×0.68＋31.4×0.032 ? ?5.6÷1.25÷0.8÷2.5÷0.47.2×0.2＋2.4×1.4 ? ? ? ?8.9×1.01 ? ? ? 7.74×（2.8－1.3）＋1.5×2.263.9×2.7＋3.9×7.3 ? ? ?18－1.8÷0.125÷0.8 ? ? ? ? ?12.7×9.9＋1.27 ? ? ? ?21×（9.3－3.7）－5.6 ? ? ?15.02-6.8-1.02 ? ? ? ? ? ?5.4×11-5.4 2.3×16+2.3×23+2.3 ? ? ? ?9.43-（6.28-1.57） ? ? ? ?3.65×4.7－36.5×0.37 ? ? ? ?46×57＋23×86 ? ? ? 13.7×0.25－3.7÷4 ? ? ? ? ? 2.22×9.9+6.66×6.7 ? ? ? ? ? ? ? ? ? ? ?101×0.87-0.91×87 ? ?10.7×16.1-15.1×10.7 ? ? ?0.79×199 ? 4.8+8.63+5.2+0.37 ? ? 5.93+0.19+2.81 ? ? ? 1.76+0.195+3.24 2.35+1.713+0.287+7.65 ? ?1.57+0.245+7.43 ? ? 6.02+3.6+1.980.134+2.66+0.866 ? ? ?1.27+3.9+0.73+16.1 ? ? 7.5＋4.9－6.5 ?3.07－0.38－1.62 ? ? 1.29＋3.7＋2.71＋6.3 ? ?8－2.45－1.553.25＋1.79－0.59＋1.75 ? 23.4－0.8－13.4－7.2 ? ?0.32×4033.2＋0.36＋4.8＋1.64 ? ?1.23＋3.4－0.23＋6.6 ? ? ?0.25×3612.7－（3.7＋0.84） ? ?36.54－1.76－4.54 ? ? ?0.25×0.73×47.6×0.8＋0.2×7.6 ? ? ? ? 0.85×199 ? ? ? ? ?0.25×8.5×4 ? 1.28×8.6＋0.72×8.6 ? ? 12.5×0.96×0.8 ? ? ?10.4－9.6×0.350.8×（4.3×1.25） ? ? ?3.12＋3.12×99 ? ? ?28.6×101－28.60.86×15.7－0.86×14.7 ? ? 2.4×102 ? ? ? ? ?2.31×1.2×0.514－7.32－2.68 ? ?2.64＋8.67＋7.36＋11.33 ? ? 70÷28 ?（2.5－0.25）×0.4 ? ? ?9.16×1.5－0.5×9.16 ? ? ?3.6－3.6×0.54.5÷1.8 ? ? ? ? ? ? ? ? 4.2÷3.5 ? ? ? ? ? ? ?930÷0.6÷5 ? ? ?63.4÷2.5÷0.4 ? ? ? ? ? ? 4.9÷1.4 ? ? ? ? ?3.9÷（1.3×5） ? （7.7＋1.54）÷0.7 ? ? ? ? 2.5×2.4 ? ? ? ? ? 2.7÷45 ? ? 15÷（0.15×0.4）0.4×125×25×0.8 =（0.4×25）×（125×0.8)=10×100=1000 1.25×（8+10） =1.25×8+1.25×10=10+12.5=22.5 9123-（123+8.8） =9123-123-8.8=9000-8.8=8991.2 1.24×8.3+8.3×1.76 =8.3×（1.24+1.76)=8.3×3=24.9 9999×1001 =9999×（1000+1）=9999×1000+9999×1 =10008999 14.8×6.3-6.3×6.5＋8.3×3.7 =（14.8-6.5）×6.3＋8.3×3.7=8.3×6.3+8.3×3.7 8.3×（6.3＋3.7） =8.3×10 =83 1.24+0.78+8.76 =（1.24+8.76）+0.78 =10+0.78 =10.78 933-157-43 =933-（157+43）=933-200=733 4821-998 =4821-1000+2=3823 I32×125×25 =4×8×125×25 =（4×25）×（8×125）=100×1000 =1000009048÷268 =（2600+2600+2600+1248）÷26=2600÷26+2600÷26+2600÷26+1248÷269 =100+100+100+48=3482881÷ 43 =（1290+1591）÷ 434=1290÷43+1591÷43=30+373.2×42.3×3.75-12.5×0.423×16=3.2×42.3×3.75-1.25×42.3×1.6=42.3×(3.2×3.75-1.25×1.6)=42.3×(4×0.8×3.75-1.25×4×0.4)1.8+18÷1.5-0.5×0.3 =1.8+12-0.15=13.8-0.15=13.656.5×8+3.5×8-47 =52+28-47=80-472700×（506－499）÷900 =2700×7÷900 =18900÷900 =21 33.02－（148.4－90.85）÷2.5=33.02－57.55÷2.5=33.02－23.02 =10（1÷1－1）÷5.1 =（1－1）÷5.1 =0÷5.1 =018.1＋（3－0.299÷0.23）×1=18.1＋1.7×1 =18.1＋1.7 =19.80.4×125×25×0.8 =(0.4×25)×(125×0.8)=10×100=1000 1.25×(8+10) =1.25×8+1.25×10=10+12.5=22.5 9123-(123+8.8) =9123-123-8.8=9000-8.8=8991.2 1.24×8.3+8.3×1.76 =8.3×(1.24+1.76)=8.3×3=24.9 9999×1001 =9999×(1000+1)=9999×1000+9999×1 =10008999 14.8×6.3-6.3×6.5+8.3×3.7 =(14.8-6.5)×6.3+8.3×3.7=8.3×6.3+8.3×3.7 8.3×(6.3+3.7) =8.3×10 =83 1.24+0.78+8.76 =(1.24+8.76)+0.78 =10+0.78 =10.78 933-157-43 =933-(157+43)=933-200=733 4821-998 =4821-1000+2=3823 ?I32×125×25 =4×8×125×25 =(4×25)×(8×125)=100×1000 =1000009048÷268 =(2600+2600+2600+1248)÷26=2600÷26+2600÷26+2600÷26+1248÷269 =100+100+100+48=3482881÷ 43 =(1290+1591)÷ 434=1290÷43+1591÷43=30+371.25×(8+10)=1.25×8+1.25×10=10+12.5=22.51.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.781/2-(4/5-1/2)=1/2+1/2-4/5=1-4/5=1/54800÷25÷4=4800÷(25x4)=4800÷100=4800÷100=482/5-(3/8-3/5)=2/5+3/5-3/8=1-3/8=5/83/4-(3/7-1/4)=3/4+1/4-3/7=1-3/7=4/73.2x0.125x2.5=0.125x8x(0.4x2.5)=1x1=10.4×125×25×0.8=(0.4×25)×(125×0.8)=10×100=10001.25×(8+10)=1.25×8+1.25×10=10+12.5=22.59123-(123+8.8)=9123-123-8.8=9000-8.8=8991.21.24×8.3+8.3×1.76=8.3×(1.24+1.76)=8.3×3=24.99999×1001=9999×(1000+1)=9999×1000+9999×1=1000899914.8×6.3-6.3×6.5+8.3×3.7=(14.8-6.5)×6.3+8.3×3.7=8.3×6.3+8.3×3.7=8.3×(6.3+3.7)=8.3×10=831.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.78933-157-43=933-(157+43)=933-200=7334821-998=4821-1000+2=382332×125×25=4×8×125×25=(4×25)×(8×125)=100×1000=1000001.8+18÷1.5-0.5×0.3=1.8+12-0.15=13.8-0.15=13.656.5×8+3.5×8-47=52+28-47=80-473.7x2.56-2.3=9.472-2.3=7.1721.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.781/2-(4/5-1/2)=1/2+1/2-4/5=1-4/5=1/54800÷25÷4=4800÷(25x4)=4800÷100=4800÷100=482/5-(3/8-3/5)=2/5+3/5-3/8=1-3/8=5/83/4-(3/7-1/4)=3/4+1/4-3/7=1-3/7=4/73.2x0.125x2.5=0.125x8x(0.4x2.5)=1x1=10.4×125×25×0.8=(0.4×25)×(125×0.8)=10×100=10001.25×(8+10)=1.25×8+1.25×10=10+12.5=22.59123-(123+8.8)=9123-123-8.8=9000-8.8=8991.21.24×8.3+8.3×1.76=8.3×(1.24+1.76)=8.3×3=24.99999×1001=9999×(1000+1)=9999×1000+9999×1=1000899914.8×6.3-6.3×6.5+8.3×3.7=(14.8-6.5)×6.3+8.3×3.7=8.3×6.3+8.3×3.7=8.3×(6.3+3.7)=8.3×10=831.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.78933-157-43=933-(157+43)=933-200=7334821-998=4821-1000+2=382332×125×25=4×8×125×25=(4×25)×(8×125)=100×1000=1000001.8+18÷1.5-0.5×0.3=1.8+12-0.15=13.8-0.15=13.656.5×8+3.5×8-47=52+28-47=80-473.7x2.56-2.3=9.472-2.3=7.172望采納！O(∩_∩)O~1.25×(8+10)=1.25×8+1.25×10=10+12.5=22.51.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.781/2-(4/5-1/2)=1/2+1/2-4/5=1-4/5=1/54800÷25÷4=4800÷(25x4)=4800÷100=4800÷100=482/5-(3/8-3/5)=2/5+3/5-3/8=1-3/8=5/83/4-(3/7-1/4)=3/4+1/4-3/7=1-3/7=4/73.2x0.125x2.5=0.125x8x(0.4x2.5)=1x1=10.4×125×25×0.8=(0.4×25)×(125×0.8)=10×100=10001.25×(8+10)=1.25×8+1.25×10=10+12.5=22.59123-(123+8.8)=9123-123-8.8=9000-8.8=8991.21.24×8.3+8.3×1.76=8.3×(1.24+1.76)=8.3×3=24.99999×1001=9999×(1000+1)=9999×1000+9999×1=1000899914.8×6.3-6.3×6.5+8.3×3.7=(14.8-6.5)×6.3+8.3×3.7=8.3×6.3+8.3×3.7=8.3×(6.3+3.7)=8.3×10=831.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.78933-157-43=933-(157+43)=933-200=7334821-998=4821-1000+2=382332×125×25=4×8×125×25=(4×25)×(8×125)=100×1000=1000001.8+18÷1.5-0.5×0.3=1.8+12-0.15=13.8-0.15=13.656.5×8+3.5×8-47=52+28-47=80-473.7x2.56-2.3=9.472-2.3=7.1721.24+0.78+8.76=(1.。
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