2025年同步练习册青岛出版社五年级数学上册青岛版淄博专版五四制第49页答案
3. 计算。
$\frac{4}{5} × 3 = $
$\frac {12}{5}$

$\frac{1}{7} × 6 = $
$\frac{6}{7}$

$\frac{8}{27} × 9 = $
$\frac {8}{3}$

$\frac{5}{12} × 3 = $
$\frac {5}{4}$

$\frac{7}{10} × 2 = $
$\frac {7}{5}$

$\frac{2}{5} × 7 = $
$\frac {14}{5}$

$\frac{7}{40} × 8 = $
$\frac {7}{5}$

$\frac{5}{7} × 14 = $
10

$\frac{1}{10} × 4 = $
$\frac {2}{5}$

$\frac{5}{4} × 16 = $
20

$\frac{16}{9} × 18 = $
32

$\frac{8}{51} × 17 = $
24

答案

$\frac {12}{5}$
$\frac{6}{7}$
$\frac {8}{3}$
$\frac {5}{4}$
$\frac {7}{5}$
$\frac {14}{5}$
$\frac {7}{5}$
10
$\frac {2}{5}$
20
32
24
1. 出租车每分钟行驶$\frac{4}{5}$千米,10分钟行驶(
8000
)米。

答案

8000
2. $\frac{2020}{2021} × 2022 = 2022 - (\quad)$

答案

$\frac {2022}{2021}$
1. 填一填。
(1)
$\frac{1}{2} × \frac{1}{3} = $ (
$\frac{1}{6}$
)
(2)
(
$\frac{2}{3}$
) × (
$\frac{2}{5}$
) = (
$\frac{4}{15}$
)

答案

1.
(1) $\frac{1}{6}$
(2) $\frac{2}{3}$；$\frac{2}{5}$；$\frac{4}{15}$
2. 先分一分,涂一涂,再用乘法计算。
(1) 12的$\frac{1}{3}$是多少?
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○○○○○○
(2) 20的$\frac{4}{5}$是多少?

答案



(1) 12×$\frac{1}{3}$=4
(2) 20×$\frac{4}{5}$=16