简便计算102×75 256×8...
简便计算102×75256×8+44×836×9968×99+68125×32270÷45...
简便计算102×75 256×8+44×8 36×99 68×99+68 125×32 270÷45
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(1)102×75
=(100+2)×75
=100×75+2×75
=7500+150
=7650;
(2)256×8+44×8
=(256+44)×8
=300×8
=2400;
(3)36×99
=36×(100-1)
=36×100-99
=3600-99
=3501;
(4)68×99+68
=(99+1)×68
=100×68
=6800;
(5)125×32
=125×8×4
=1000×4
=4000;
(6)270÷45
=270÷(9×5)
=270÷9÷5
=30÷5
=6.
=(100+2)×75
=100×75+2×75
=7500+150
=7650;
(2)256×8+44×8
=(256+44)×8
=300×8
=2400;
(3)36×99
=36×(100-1)
=36×100-99
=3600-99
=3501;
(4)68×99+68
=(99+1)×68
=100×68
=6800;
(5)125×32
=125×8×4
=1000×4
=4000;
(6)270÷45
=270÷(9×5)
=270÷9÷5
=30÷5
=6.
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