11×9 22×35 33×7的简便运算是什么?

2025-01-24 09:31:39
推荐回答(2个)
回答1:

11×9=(9+2)×9=81+11=99或者=(10+1)×9=90+9=99
22×35=22×(30+5)=660+110=770
33×7=(30+3)×7=210+21=231

回答2:

11×9+22×35+33×7
=11×9+(11×2)×35+(11×3)×7
=11×9+11×(2×35)+11×(3×7)
=11×9+11×70+11×21
=11×(9+70+21)
=11×100
=1100