Question

4.25×6.6+11.5×3.4+42.5×0.02怎么简便运算？

Answer 1

因为42.5×0.02=4.25×0.2，运用乘法分配律逆运算就是有4.25×（6.6+0.2）+11.5×3.4=4.25×6.8+11.5×3.4=4.25×2×3.4+11.5×3.4=8.5×3.4+11.5×3.4=3.4×（8.5+11.5）=3.4×20=68

Answer 2

4.25×6.6+11.5×3.4+42.5×0.02
=(4.25x6.6+4.25x0.2)+11.5x3.4
=4.25x6.8+11.5x3.4
=8.5x3.4+11.5x3.4
=(8.5+11.5)x3.4
=20x3.4
=68。

Answer 3

原式=4.25×6.6+4.25×0.2+11.5×3.4
=4.25×(6.6+0.2)+11.5×3.4
=4.25×6.8+11.5×3.4
=17×1.7+2.3×17
=17×（1.7+2.3）
=17×4
=68.