3.9*14.7-3.9*4.7 1.25*3.2*2.5 3.2*101怎樣算簡便就怎樣算

3.9*14.7-3.9*4.7 1.25*3.2*2.5 3.2*101怎樣算簡便就怎樣算

3.9*14.7-3.9*4.7
=3.9X（14.7-4.7）
=3.9X10
=39
1.25*3.2*2.5
=1.25X（8X0.4）X2.5
=（1.25X8）X（0.4X2.5）
=10X1
=10
3.2*101
=3.2X（100+1）
=3.2X100+3.2X1
=320+3.2
=323.2
望採納

求0.96×101 3.69×9+3.69 2.14×1.25×0.8 2.5×3.2的簡便計算結合脫式運算

0.96×101
=0.96×（100+1）
=0.96×100+0.96×1
=96.96
3.69×9+3.69
=3.69×（9+1）
=3.69×10
=36.9
2.14×1.25×0.8
=2.14×（1.25×0.8）
=2.14×1
=2.14
2.5×3.2
=2.5×4×0.8
=10×0.8
=8

簡便計算1.6×2.8×1.25

1.6×2.8×1.25
=（0.2×8）×2.8×1.25
=（0.2×2.8）×（8×1.25）
=0.56×10
=5.6

5.6/1.25/0.8/2.5/0.4咋麼簡便計算？

5.6÷1.25÷0.8÷2.5÷0.4
=5.6÷（1.25×0.8）÷（2.5×0.4）
=5.6÷1÷1
=5.6