1. 直接写出得数。(20☆)
$24×\frac{3}{8}=$
$20×(1+\frac{1}{5})=$
$15×\frac{1}{5}+15=$
$4.8×\frac{5}{6}=$
$5.4-5.4×\frac{1}{9}=$
$4.9×(1-\frac{1}{7})=$
$\frac{2}{3}×\frac{9}{10}=$
$12+12×\frac{1}{6}=$
$19×(1+\frac{1}{57})=$
$3.2×\frac{5}{8}=$
$10×(1-\frac{3}{10})=$
$18-18×\frac{5}{24}=$
$630×\frac{4}{7}=$
$6.3×\frac{5}{7}+6.3=$
$8.1×(\frac{7}{9}+1)=$
$64×\frac{5}{8}=$
$36-36×\frac{2}{9}=$
$45×(1-\frac{5}{7})=$
$8×\frac{3}{16}=$
$150-150×\frac{2}{15}=$
$24×\frac{3}{8}=$
$20×(1+\frac{1}{5})=$
$15×\frac{1}{5}+15=$
$4.8×\frac{5}{6}=$
$5.4-5.4×\frac{1}{9}=$
$4.9×(1-\frac{1}{7})=$
$\frac{2}{3}×\frac{9}{10}=$
$12+12×\frac{1}{6}=$
$19×(1+\frac{1}{57})=$
$3.2×\frac{5}{8}=$
$10×(1-\frac{3}{10})=$
$18-18×\frac{5}{24}=$
$630×\frac{4}{7}=$
$6.3×\frac{5}{7}+6.3=$
$8.1×(\frac{7}{9}+1)=$
$64×\frac{5}{8}=$
$36-36×\frac{2}{9}=$
$45×(1-\frac{5}{7})=$
$8×\frac{3}{16}=$
$150-150×\frac{2}{15}=$
答案
1. 9 24 18 4
$\frac{24}{5}$ $\frac{21}{5}$ $\frac{3}{5}$ 14
$\frac{58}{3}$ 2 7 $14\frac{1}{4}$
360 $\frac{54}{5}$ $\frac{72}{5}$ 40
28 $\frac{90}{7}$ $\frac{3}{2}$ 130
$\frac{24}{5}$ $\frac{21}{5}$ $\frac{3}{5}$ 14
$\frac{58}{3}$ 2 7 $14\frac{1}{4}$
360 $\frac{54}{5}$ $\frac{72}{5}$ 40
28 $\frac{90}{7}$ $\frac{3}{2}$ 130
2. 看图列式计算。(4☆)
(1)
(2)
(1)
(2)
答案
2. (1)$60×(1+\frac{1}{3})=80(\mathrm{kg})$
(2)$40×(1-\frac{1}{4})=30(\mathrm{支})$
(2)$40×(1-\frac{1}{4})=30(\mathrm{支})$
3. 在○里填上“>”“<”或“=”。(18☆)
1.5×$\frac{3}{5}$ +1.5 ○0.6
$\frac{5}{8}$ ○ (1-$\frac{1}{4}$)×$\frac{2}{3}$
3.6 -3.6×$\frac{2}{9}$ ○$\frac{7}{2}$
$\frac{3}{4}$ -$\frac{3}{4}$×$\frac{1}{3}$ ○0
$\frac{2}{9}$×(1-$\frac{3}{5}$) ○$\frac{2}{9}$
$\frac{1}{5}$ +$\frac{1}{5}$×$\frac{2}{3}$ ○$\frac{3}{5}$
$\frac{5}{6}$ -$\frac{5}{6}$×$\frac{3}{5}$ ○$\frac{5}{6}$×$\frac{1}{3}$
3×$\frac{4}{3}$ -2.4 ○3
$\frac{2}{5}$ +$\frac{2}{5}$×$\frac{1}{3}$ ○(1+$\frac{1}{3}$)×$\frac{2}{5}$
1.5×$\frac{3}{5}$ +1.5 ○0.6
$\frac{5}{8}$ ○ (1-$\frac{1}{4}$)×$\frac{2}{3}$
3.6 -3.6×$\frac{2}{9}$ ○$\frac{7}{2}$
$\frac{3}{4}$ -$\frac{3}{4}$×$\frac{1}{3}$ ○0
$\frac{2}{9}$×(1-$\frac{3}{5}$) ○$\frac{2}{9}$
$\frac{1}{5}$ +$\frac{1}{5}$×$\frac{2}{3}$ ○$\frac{3}{5}$
$\frac{5}{6}$ -$\frac{5}{6}$×$\frac{3}{5}$ ○$\frac{5}{6}$×$\frac{1}{3}$
3×$\frac{4}{3}$ -2.4 ○3
$\frac{2}{5}$ +$\frac{2}{5}$×$\frac{1}{3}$ ○(1+$\frac{1}{3}$)×$\frac{2}{5}$
答案
3. > > <
> < <
> < =
> < <
> < =
4. 小明身高 150 cm,妹妹的身高比小明矮$\frac{1}{5}$。妹妹的身高是多少厘米?(8☆)
用时:分钟
共得:☆/50 ☆
用时:分钟
共得:☆/50 ☆
答案
4. $150×(1-\frac{1}{5})=120(\mathrm{cm})$
答:妹妹的身高是 120 cm。
答:妹妹的身高是 120 cm。
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