简便计算3.7×4.6+6.3×4.68.8×0.1250.34×99+0.344×1.98×0.25101×0.247.25×0.35-7.25×0.25

Question

简便计算

3.7×4.6+6.3×4.6	8.8×0.125	0.34×99+0.34
4×1.98×0.25	101×0.24	7.25×0.35-7.25×0.25

Answer 1

（1）3.7×4.6+6.3×4.6
=（3.7+6.3）×4.6
=10×4.6
=46；

（2）8.8×0.125
=（8+0.8）×0.125
=8×0.125+0.8×0.125
=1+0.1
=1.1；

（3）0.34×99+0.34
=0.34×（99+1）
=0.34×100
=34；

（4）4×1.98×0.25
=4×0.25×1.98
=1×1.98
=1.98；

（5）101×0.24
=（100+1）×0.24
=100×0.24+1×0.24
=24+0.24
=24.24；

（6）7.25×0.35-7.25×0.25
=7.25×（0.35-0.25）
=7.25×0.1
=0.725．