一:有没有学三年级的速算与巧算的题
题干信息不全
二:三年级数学巧算
54×65+65×46
=65x(54+46)
=65x100
=6500
45×24+76×45
=45x(24+76)
=45x100=4500
368+7224÷12
=368+602
=970
2748-135-548
=2748-548-135
=2065
﹙7851-3018﹚÷27
=4833÷27
=179
800-400÷25
=800-16
=784
3900÷26×18
=150×18
=2700
其余的追问一下
三:数学巧算三年级
342-420÷60
=342-7
=335
245+255÷30
=245+8.5
=253.5
218-178+82
=218+82-178
=300-178
=122
5×182+18×5
=5×(182+18)
=5×200
=1000
82×﹙351+104﹚
=82×455
=37310
﹙522-477﹚×140
=45×140
=6300
9090÷15×20
=9090×20÷15
=181800÷15
=12120
63×63+37×36 估计你写错数字了,否则可以简便
=3969+1332
=5301
35×9÷3
=35×3
=105