Question

4.2×8.8+2.2×1.2怎么简便运算？

Answer 1

4.2×8.8+2.2×1.2
=（2.2+2）×8.8+2.2×1.2
=2.2×8.8+2×8.8+2.2×1.2
=2.2×（8.8+1.2）+2×8.8
=2.2×10+17.6
=22+17.6
=39.6

Answer 2

回答如下 ：
4.2×8.8+2.2×1.2 的数学题目
的竖式简便运算步骤如下 ：
(1) = 36.96+2.64
(2) = 39.6

Answer 3

(2+2.2)ⅹ8.8+2.2ⅹ1.2
2.2ⅹ8.8+2.2ⅹ1.2+2ⅹ8.8
2.2X(8.8+1.2)+17.6
2.2*10+17.6
22+17.6
39.6