80道脱式计算答案过程

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 =100000 9048÷268 =（2600+2600+2600+1248）÷26 =2600÷26+2600÷26+2600÷26+1248÷269 =100+100+100+48 =348 2881÷ 43 =（1290+1591）÷ 434 =1290÷43+1591÷43 =30+37 3.2×42.3×3.75-12.5×0.423×16 =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×(4x 0.4x 7.5-1.25x 4x 0.4) =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 =13.65 6.5×8+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 =26.76 8×7 分之 4÷[1÷(3.2-2.95)] =8×4/7÷[1÷0.25] =8×4/7÷4 =8/7 2700×（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 =0 18.1＋（3－0.299÷0.23）×1 =18.1＋1.7×1 =18.1＋1.7 =19.8 [-18]+29+[-52]+60 = 19 [-3]+[-2]+[-1]+0+1+2 = -3 [-301]+125+301+[-75] = 50 [-1]+[-1/2]+3/4+[-1/4] = -1 [-7/2]+5/6+[-0.5]+4/5+19/6 = 1.25 [-26.54]+[-6.14]+18.54+6.14 = -8 1.125+[-17/5]+[-1/8]+[-0.6] = -3 0.45×2.5＝1.125 0.8×1.25＝1 0.3×3.6＝1.08 0.3×0.3＝0.09 10×0.07＝ 0.7 0.92×0.4＝ 0.368 0.2×0.26＝0.052 0.14×4＝0.56 0.02×0.1＝0.002 1.2×0.3＝ 0.36 2.5×0.4＝1 2.4×5＝12 0.22×4＝ 0.88 3.25×0＝0 0.9－0.52＝ 0.38 3.99×1＝3.99 0×3.52＝ 0 12.5×8＝100 8÷10 = 0.8 10-1.8-7.2= ...