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简介:
类型一:
(8+80)x125
=8×125+80×125
=1000+10000
=11000
类型五:
65×38+65×61+65
=65×(38+61+1)
=65×100
=6500
类型二:
45×78+78×55
=78×(45+55)
=78×100
=7800
105×83-5×83
=83×(105-5)
=83×100
=8300
类型三:
99×66
=(100-1)×66
=100×66-1×66
=6600-66
=6534
102×88
=(100+2)×88
=100×88+2×88
=8800+176
=8976
类型四:
440x250
=(400+40)×250
=400×250+40×250
=100000+10000
=110000
125×88
=125×(80+8)
=125×80+125×8
=10000+1000
=11000