102x4.2的简便运算

2025-03-18 19:27:04
推荐回答(3个)
回答1:

102×4.2
=(100+2)×4.2
=100×4.2+2×4.2
=420+8.4
=428.4

回答2:

(100*4.2)+(2*4.2)

回答3:

(100×4.2)+2