Question

计算下面各题，能用简便算法的用简便算法 [（5.1-3.6）÷0.8-1]×0.09 98.4×98+98.4×2 30.1

计算下面各题，能用简便算法的用简便算法 [（5.1-3.6）÷0.8-1]×0.09 98.4×98+98.4×2 30.1÷[（6.07+2.53）×0.7] 0.94×2.5+0.094×75 （77.4-3.096÷0.4）÷0.03 9.28×13-9.28×4+9.28 97.2÷[（54.8+45.2）×（6-5.46）] 1.25×32．

Answer 1

（1）[（5.1-3.6）÷0.8-1]×0.09
=[1.5÷0.8-1]×0.09
=[1.875-1]×0.09
=0.875×0.09
=0.07875

（2）98.4×98+98.4×2
=98.4×（98+2）
=98.4×100
=9840

（3）30.1÷[（6.07+2.53）×0.7]
=30.1÷[8.6×0.7]
=30.1÷6.02
=5

（4）0.94×2.5+0.094×75
=0.94×2.5+0.94×7.5
=0.94×（2.5+7.5）
=0.94×10
=9.4

（5）（77.4-3.096÷0.4）÷0.03
=（77.4-7.74）÷0.03
=69.66÷0.03
=2322

（6）9.28×13-9.28×4+9.28
=9.28×（13-4+1）
=9.28×10
=92.8

（7）97.2÷[（54.8+45.2）×（6-5.46）]
=97.2÷[100×0.54]
=97.2÷54
=1.8

（8）1.25×32
=1.25×8×4
=10×4
=40