35x括号7x4括号怎样计算简便？

Question

如题所述

Answer 1

简便计算过程如下：

35×（7×4）

=35×7×4

=35×4×7

=140×7

=980

Answer 2

35×（7×4）=35×7×2×2=（35×2）×（7×2）=70×14=980
如果觉得70×14还麻烦，可以再拆70×14=70×7×2=490×2=980

Answer 3

35×(7×4)
=35×2×7×2
=70×14
=980

Answer 4

35×(7×4)
=5×7×7×4
=7×7×20
=49×20
=980

Answer 5

35×(7×4)
=35x28
=35x(30-2)
=35x30-35x2
=1050-70
=980