Question

125x4x25x8 125x64 25x(4x59) 205x101-205 132x65+35x132 167x2+167x3+167x5 78x99+78 39x8+6x39-39x4

这些算式全都用层等式计算（乘法分配律）求求你们了。行行好，十万火急、、

Answer 1

125x4x25x8
=(125x8)x(25x4)
=1000x100
=100000

125x64
=125x8x8
=1000x8
=8000

25x(4x59)
=25x4x59
=100x59
=5900

205x101-205
=205x101-205x1
=205x(101-1)
=205x100
=20500

132x65+35x132
=132x(65+35)
=132x100
=13200

167x2+167x3+167x5
=167x(2+3+5)
=167x10
=1670

78x99+78
=78x99+78x1
=78x(99+1)
=78x100
=7800

39x8+6x39-39x4
=39x(8+6-4)
=39x10
=390