Question

用简便方法计算3.8×3.5+1.62×35？

Answer 1

用简便方法计算：3.8×3.5+1.62×35
35×（0.38+1.62）
=35×2=70

Answer 2

解答： 解：（1）3.5×37+6.5×37
=（3.5+6.5）举闹雀吵×37
=10×37
=370

（2）15.85-4.8-5.2
=15.85-（4.8+5.2）
=15.85-10
=5.85

（3）1.25×3.2×0.8
=（1.25×0.8）×3.2
=1×3.2
=3.2
点评：根据数正岁罩字特点，采取合适的方法进行简算．

Answer 3

答案如下：州简
3.8×3.5+1.62×35＝O.38×35+1.62×35＝（0.38+1.62）×35＝拦迹谈2×35＝70
思路：
运用凑整法和乘法分配律的逆运算简碰

Answer 4

3.8×3.5+1.62×35
=3.5×(3.8+16.2)
=3.5×20
=70

Answer 5

解：该式行禅迅子=3.8乘以3.5+16.2乘以3.5
=（3.8+16.2）乘档此袭前以3.5
=20乘以3.5
=7