88.8×8.7+11.2×9.9-11.2×1.2的简便运算怎么做?

2025-04-13 05:19:26
推荐回答(1个)
回答1:

88.8×8.7+11.2×9.9-11.2×1.2
=88.8×8.7+11.2×(9.9-1.2)
=88.8×8.7+11.2×8.7
=(88.8+11.2)×8.7
=100×8.7
=870