化简比并求比值:2.5:634:785:1545分:113小时.-数学
题文
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答案
(1)2.5:6, =(2.5×10):(6×10), =25:60, =(25÷5):(60÷5), =5:12; 2.5:6, =2.5÷6, =
(2)
=(
=6:7;
=
=
(3)5:
(5×5):(
=25:1, 5:
=5÷
=25; (4)45分:1
=
=
=(
=9:16; 45分:1
=
|
题文
|
答案
(1)2.5:6, =(2.5×10):(6×10), =25:60, =(25÷5):(60÷5), =5:12; 2.5:6, =2.5÷6, =
(2)
=(
=6:7;
=
=
(3)5:
(5×5):(
=25:1, 5:
=5÷
=25; (4)45分:1
=
=
=(
=9:16; 45分:1
=
|