12/5x15/7x24x7/5简便计算?
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为了方便看,分数用括号括起来。
12/5x15/7x24x7/5
=(12/5)x(3x5/7)x24x(7/5)
=(12/5)x(3x1/1)x24x(1/1)
=(12/5)x3x24
=2.4x72
=2.4x(70+2)
=168+4.8
=172.8
12/5x15/7x24x7/5
=(12/5)x(3x5/7)x24x(7/5)
=(12/5)x(3x1/1)x24x(1/1)
=(12/5)x3x24
=2.4x72
=2.4x(70+2)
=168+4.8
=172.8
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12/5×15/7×24×7/5
=(7/7)×(15/5)×12×24/(5×5)
=1×3×12×24/25
=36×(25-1)/25
=36×25/25-36×1/25
=36-36/25
=36-1-11/25
=35-11/25
=34又25分之14
=(7/7)×(15/5)×12×24/(5×5)
=1×3×12×24/25
=36×(25-1)/25
=36×25/25-36×1/25
=36-36/25
=36-1-11/25
=35-11/25
=34又25分之14
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(12/5) x (15/7) x 24 x (7/5)
= (12/1) x (3/1) x 24 x (1/5)
= 36 x 24 x (1/5) = 864/5 =172.8
= (12/1) x (3/1) x 24 x (1/5)
= 36 x 24 x (1/5) = 864/5 =172.8
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