化简比并求比值.2.4:60.75:1145:1545分:113小时.-数学
题文
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答案
(1)2.4:6, =(2.4×10):(6×10), =24:60, =(24÷12):(60÷12), =2:5; 2.4:6, =2.4÷6, =0.4; (2)0.75:1
=
=(
=3:5; 0.75:1
=
=
=
(3)5:
(5×5):(
=25:1, 5:
=5÷
=25; (4)45分:1
=
=
=(
=9:16; 45分:1
=
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题文
|
答案
(1)2.4:6, =(2.4×10):(6×10), =24:60, =(24÷12):(60÷12), =2:5; 2.4:6, =2.4÷6, =0.4; (2)0.75:1
=
=(
=3:5; 0.75:1
=
=
=
(3)5:
(5×5):(
=25:1, 5:
=5÷
=25; (4)45分:1
=
=
=(
=9:16; 45分:1
=
|