(小学六年级题)递等式计算(能简便的简便,每个步骤详细)20.5×(0.032÷0.08)

2025-01-20 22:38:58
推荐回答(3个)
回答1:

(1)20.5×(0.032÷0.08)
=20.5×(3.2÷8)
=(20+0.5)×0.4
=8++0.2
=8.2
(2)(12分之7×5分之4-5分之2)÷10分之7
=(7/12*4/5-2/5)÷7/10
=(7/15-2/5)÷7/10
=1/15×10/7
=2/21
(3)14×(6分之5-4分之3)÷6分之1
=14×2/24×6/1
=7
(4)[3分之4-(3分之4-2分之1)]÷8分之5
=[4/3-(8-3)/6]÷5/8
=[4/3-5/6]×8/5
=1/2×8/5
=4/5

回答2:

20.5×(0.032÷0.08)

=20.5×0.4
=8.2

(12分之7×4-5分之2)÷10分之7

=(15分之7-5分之2)÷10分之7
=(15分之7-15分之6)÷10分之7
=15分之1÷10分之7
=21分之2

14×(6分之5-4分之3)÷6分之1

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回答3:

20.5×(0.032÷0.08)
=20.5×0.4
=82
(12分之7×5分之4-5分之2)÷10分之7
=(7/15 -2/5 )÷710
=1/15 ÷7/10
=2/21

14×(6分之5-4分之3)÷6分之1
=14×1/12 ÷1/6
=7/6 ÷1/6
=7

[3分之4-(3分之4-2分之1)]÷8分之5
=[4/3 -(4/3 -1/2 )]÷5/8
=[4/3 -5/6 ]÷5/8
=1/2 ÷5/8
=4/5