2.4里面有多少个0.08?
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解:2.4里面有( 30 )个0.08
∵已知需求出2.4里面有多少个0.08
1个0.08 = 1 × 0.08 = 0.08
2个0.08 = 0.08 + 0.08 = 2 × 0.08 = 0.16
∴设2.4里面有x个0.08
x × 0.08 = 2.4
(8/100)x = (2×10+4)/10
(2/25)x = 24/10
(2/25)x = 12/5
x = 12/5 ÷ 2/25
x = 12/5 × 25/2
∴x = 30
答:2.4里面有30个0.08
∵已知需求出2.4里面有多少个0.08
1个0.08 = 1 × 0.08 = 0.08
2个0.08 = 0.08 + 0.08 = 2 × 0.08 = 0.16
∴设2.4里面有x个0.08
x × 0.08 = 2.4
(8/100)x = (2×10+4)/10
(2/25)x = 24/10
(2/25)x = 12/5
x = 12/5 ÷ 2/25
x = 12/5 × 25/2
∴x = 30
答:2.4里面有30个0.08
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