3.8乘以19分之2等于,4.5乘以27分之7等于,12分之5乘以4.8等于,21分之13乘以0.
3.8乘以19分之2等于,4.5乘以27分之7等于,12分之5乘以4.8等于,21分之13乘以0.4等于,1.5乘以5分之4等于,5.5乘以22分之9等于,6.4乘以32...
3.8乘以19分之2等于,4.5乘以27分之7等于,12分之5乘以4.8等于,21分之13乘以0.4等于,1.5乘以5分之4等于,5.5乘以22分之9等于,6.4乘以32分之15等于,3.5乘以7分之5等于,要过程。
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2015-09-09 · 知道合伙人教育行家
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3.8乘以19分之2
=3.8/19×2
= 0.2×2
= 0.4
4.5乘以27分之7
=9×3.5/27
=3.5/3
=7/6
12分之5乘以4.8
=4.8/12×5
=0.4×5
=2
21分之13乘以0.4
=13/21×2/5
=26/105
1.5乘以5分之4
=1.5/5×4
=0.3×4
=1.2
5.5乘以22分之9
=5.5/22×9
=1/4×9
=9/4
6.4乘以32分之15
=6.4/32×15
=0.2×15
=3
3.5乘以7分之5
=3.5/7×5
=1/2×5
=5/2
=3.8/19×2
= 0.2×2
= 0.4
4.5乘以27分之7
=9×3.5/27
=3.5/3
=7/6
12分之5乘以4.8
=4.8/12×5
=0.4×5
=2
21分之13乘以0.4
=13/21×2/5
=26/105
1.5乘以5分之4
=1.5/5×4
=0.3×4
=1.2
5.5乘以22分之9
=5.5/22×9
=1/4×9
=9/4
6.4乘以32分之15
=6.4/32×15
=0.2×15
=3
3.5乘以7分之5
=3.5/7×5
=1/2×5
=5/2
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