三年级数学天天练试题及答案2018.11.5(计算问题)(2)
网络资源
2018-10-25 20:30:27
【答案】
解:
(1)24x15
=(24+12)x10
=36x10
=360
(2)248x15
=(248+124)x10
=372x10
=3720
(3)3456x15
=(3456+1728)x10
=5184x10
=51840