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简介:
125×(17×8)×4
=125×8×4×17
=1000×68
=68000
25×16×125
=25×2×8×125
=50×1000
=50000
13×99
=13×(100-1)
=1300-13
=1287
7900÷4÷25
=7900÷(4×25)
=7900÷100
=79
150×40÷50
=150÷50×40
=3×40
=120
5600÷(25×7)
=56×100÷25÷7
=56÷7×100÷25
=32
210÷42×6
=210÷7÷6×6
=210÷7
=30
39600÷25
=396×100÷25
=396×4
=1584
321×81+321×19
=321×(81+19)
=321×100
=32100
5600÷(1400÷16)
=5600÷1400×16
=4×16
=64
27000÷125
=27×1000÷125
=27×8
=216
99×256+256
=99×256+256×1
=256×(99+1)
=25600
45×102
=45×(100+2)
=45×100+45×2
=4590
99×26
=(100-1)×26
=100×26-1×26
=2574
35×8+35×6-4×35
=35×(8+6-4)
=35×10
=350