(33×56×49)÷(11×8×7)运用巧算

问题描述:

(33×56×49)÷(11×8×7)运用巧算
要求运用巧算(33×56×49)÷(11×8×7)

=11*3*7*8*7*7/11/8/7=3*7*7=21*7=147