Question

计算下列各题，怎么简便就怎么算． 0.125×32 0.78×101 3.26×10.7-3.26

计算下列各题，怎么简便就怎么算． 0.125×32 0.78×101 3.26×10.7-3.26×0.7 72×0.81+10.4 2.5×7.1×4 56.5×99+56.5．

Answer 1

0.125×32
=0.125×（8×4）
=0.125×8×4
=1×4
=4

0.78×101
=0.78×（100+1）
=0.78×100+0.78×1
=78+0.78
=78.78

3.26×10.7-3.26×0.7
=3.26×（10.7-0.7）
=3.26×10
=32.6

72×0.81+10.4
=58.32+10.4
=68.72

2.5×7.1×4
=2.5×4×7.1
=10×7.1
=71

56.5×99+56.5
=56.5×（99+1）
=56.5×100
=5650