运用乘法运算定律计算下面各题.19×25×4 &...

运用乘法运算定律计算下面各题.19×25×4 102×46 35×39+65×39.
2024-11-27 23:46:15
推荐回答(1个)
回答(1):

(1)19×25×4
=19×(25×4)
=19×100
=1900
(2)102×46
=(100+2)×46
=100×46+46×2
=4600+92
=4692
(3)35×39+65×39
=(35+65)×39
=100×39
=3900.