Question

7.7×9.9+0.77简便计算 怎么写?

Answer 1

因为0.77=7.7×0.1，所以原式等于7.7×9.9+7.7×0.1，运用乘法分配律就是7.7×（9.9+0.1）=7.7×10=77

Answer 2

7.7×9.9+0.77
=7.7×9.9+7.7×0.1
=7.7×(9.9+0.1)
=7.7×10
=77

Answer 3

7.7x9.9+0.77
＝7.7x10-7.7x0.1+0.77
＝77-0.77+0.77
＝77

Answer 4

5.6x9.9＋56的简便计算怎么写？ 5.6×9.9+56＝5.6×（10-0.1）+56＝5.6×10-5.6x0.1+56＝56-0.56+56＝112-0.56＝111.44

Answer 5

因为7.7×9.9=0.77×99，所以原式等于0.77×99+0.77运用乘法分配律逆运算就是有0.77×（99+1）=77