Question

4.25x9.9+42.5怎么简算？

Answer 1

4.25x9.9+42.5怎么简算？
=42.5×0.99+42.5×1
=42.5×（0.99+1）
=42.5×1.99
=42.5×（2-0.01）
=85-0.425
=84.575
望采纳 谢谢~~

Answer 2

解：首先，解题前要弄清题意。其次，明确使用什么技巧或方法来做。这道题要运用乘法结合律和分配律哦。
4.25x9.9+42.5
=4.25×（10-0.1）+42.5
=42.5-0.425+42.5
=85-0.425
=84.575

Answer 3

4.25＊9.9+42.5
=4.25＊（9.9+10）
=4.25＊19.9
=4.25＊（20-0.1）
=4.25＊20-4.25＊0.1
=85-0.425
=84.575

Answer 4

采用乘法分配律可得：4.25×（9.9+10）=4.25×20-4.25×0.1=8.5-0.425=8.125

Answer 5

4.25×9.9+42.5
=4.25×9.9+4.25×10
=4.25×（9.9+10）
=4.25×19.9
=84.575