3个回答
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1题:
(1)化简比:
4.5:1.5
=(4.5×10):(1.5×10)
=45:15
=3:1
(2)求比值:
4.5:1.5
=4.5÷1.5
=3
2题:
(1)化简比
9分之4:3分之2
=(4/9×9):(2/3×9)
=4:6
=2:3
(2)求比值:
4/9:2/3
=4/9÷2/3
=4/9×3/2
=2/3
3题
(1)化简比
2.8:7分之4
=(14/5×35):(4/7×35)
=98:20
=49:10
(2)求比值
2.8:7分之4
=14/5:4/7
=14/5÷4/7
=14/5×7/4
=4.9
(1)化简比:
4.5:1.5
=(4.5×10):(1.5×10)
=45:15
=3:1
(2)求比值:
4.5:1.5
=4.5÷1.5
=3
2题:
(1)化简比
9分之4:3分之2
=(4/9×9):(2/3×9)
=4:6
=2:3
(2)求比值:
4/9:2/3
=4/9÷2/3
=4/9×3/2
=2/3
3题
(1)化简比
2.8:7分之4
=(14/5×35):(4/7×35)
=98:20
=49:10
(2)求比值
2.8:7分之4
=14/5:4/7
=14/5÷4/7
=14/5×7/4
=4.9
展开全部
1题:
(1)化简比:
4.5:1.5
=(4.5×10):(1.5×10)
=45:15
=3:1
(2)求比值:
4.5:1.5
=4.5÷1.5
=3
2题:
(1)化简比
9分之4:3分之2
=(4/9×9):(2/3×9)
=4:6
=2:3
(2)求比值:
4/9:2/3
=4/9÷2/3
=4/9×3/2
=2/3
3题
(1)化简比
2.8:7分之4
=(14/5×35):(4/7×35)
=98:20
=49:10
(2)求比值
2.8:7分之4
=14/5:4/7
=14/5÷4/7
=14/5×7/4
=4.9
(1)化简比:
4.5:1.5
=(4.5×10):(1.5×10)
=45:15
=3:1
(2)求比值:
4.5:1.5
=4.5÷1.5
=3
2题:
(1)化简比
9分之4:3分之2
=(4/9×9):(2/3×9)
=4:6
=2:3
(2)求比值:
4/9:2/3
=4/9÷2/3
=4/9×3/2
=2/3
3题
(1)化简比
2.8:7分之4
=(14/5×35):(4/7×35)
=98:20
=49:10
(2)求比值
2.8:7分之4
=14/5:4/7
=14/5÷4/7
=14/5×7/4
=4.9
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第一题:化简比:3:1比值:3第二题:化简比:2:3比值:3分之2第三题:化简比:49:10比值:4.9
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