您好:
15×16
=15x2x8
=30x8
=240
35×25
=35x20+35x5
=700+175
=875
33×25
=30x25+3x25
=750+75
=825
55×12
=55x2x6
=110x6
=660
270÷54
=270÷27÷2
=10÷2
=5
810÷45
=810÷9÷5
=90÷5
=18
360÷24
=360÷12÷2
=30÷2
=15
420÷28
=420÷7÷4
=60÷4
=15
125×56
=125x8x7
=1000x7
=7000
4004×25
=1001x4x25
=1001x100
=100100
56×101-56
=56x(101-1)
=56x100
=5600
如果本题有什么不明白可以追问,如果满意记得采纳
如果有其他问题请另发或点击向我求助,答题不易,请谅解,谢谢。
祝学习进步!
追问其实我都说了,这些题我会,而且已经交上去批了,但还是谢谢