一、直接写出得数。
$48\div0.8=$ $3.14\times200=$ $1.8 + 0.42=$
$2.3 - 1.12=$ $3.7 + 0.34=$ $2.4\times5=$
$5.6\div7=$ $12.6\div0.6=$ $490\div0.7=$
$4.6\times20=$ $7.4\times5=$ $2.18 - 1.2=$
$25\div27=\frac{(\ \ \ \ \ )}{(\ \ \ \ \ )}$ $18\div23=\frac{(\ \ \ \ \ )}{(\ \ \ \ \ )}$ $\frac{3}{7}=(\ \ \ \ \ )\div(\ \ \ \ \ )$
$13\div15=\frac{(\ \ \ \ \ )}{(\ \ \ \ \ )}$ $\frac{11}{20}=(\ \ \ \ \ )\div(\ \ \ \ \ )$ $13\div(\ \ \ \ \ )=\frac{13}{51}$
$(\ \ \ \ \ )\div(\ \ \ \ \ )=\frac{7}{15}$ $\frac{11}{100}=(\ \ \ \ \ )\div(\ \ \ \ \ )$ $23\div(\ \ \ \ \ )=\frac{23}{50}$
$48\div0.8=$ $3.14\times200=$ $1.8 + 0.42=$
$2.3 - 1.12=$ $3.7 + 0.34=$ $2.4\times5=$
$5.6\div7=$ $12.6\div0.6=$ $490\div0.7=$
$4.6\times20=$ $7.4\times5=$ $2.18 - 1.2=$
$25\div27=\frac{(\ \ \ \ \ )}{(\ \ \ \ \ )}$ $18\div23=\frac{(\ \ \ \ \ )}{(\ \ \ \ \ )}$ $\frac{3}{7}=(\ \ \ \ \ )\div(\ \ \ \ \ )$
$13\div15=\frac{(\ \ \ \ \ )}{(\ \ \ \ \ )}$ $\frac{11}{20}=(\ \ \ \ \ )\div(\ \ \ \ \ )$ $13\div(\ \ \ \ \ )=\frac{13}{51}$
$(\ \ \ \ \ )\div(\ \ \ \ \ )=\frac{7}{15}$ $\frac{11}{100}=(\ \ \ \ \ )\div(\ \ \ \ \ )$ $23\div(\ \ \ \ \ )=\frac{23}{50}$
答案:
60 628 2.22
1.18 4.04 12
0.8 21 700
92 37 0.98
$\frac{25}{27}$ $\frac{18}{23}$ 3 7
$\frac{13}{15}$ 11 20 51
7 15 11 100 50
二、填一填。
$7\ cm=\frac{(\ \ \ \ \ )}{(\ \ \ \ \ )}dm$ $300\ g=\frac{(\ \ \ \ \ )}{(\ \ \ \ \ )}kg$ $8\ dm=\frac{(\ \ \ \ \ )}{(\ \ \ \ \ )}m$
$35\ 秒=\frac{(\ \ \ \ \ )}{(\ \ \ \ \ )}分$ $150\ kg=\frac{(\ \ \ \ \ )}{(\ \ \ \ \ )}t$ $7\ 角=\frac{(\ \ \ \ \ )}{(\ \ \ \ \ )}元$
$20\ 分=\frac{(\ \ \ \ \ )}{(\ \ \ \ \ )}时$ $9\ 分=\frac{(\ \ \ \ \ )}{(\ \ \ \ \ )}角$ $19\ 公顷=\frac{(\ \ \ \ \ )}{(\ \ \ \ \ )}平方千米$
$7\ cm=\frac{(\ \ \ \ \ )}{(\ \ \ \ \ )}dm$ $300\ g=\frac{(\ \ \ \ \ )}{(\ \ \ \ \ )}kg$ $8\ dm=\frac{(\ \ \ \ \ )}{(\ \ \ \ \ )}m$
$35\ 秒=\frac{(\ \ \ \ \ )}{(\ \ \ \ \ )}分$ $150\ kg=\frac{(\ \ \ \ \ )}{(\ \ \ \ \ )}t$ $7\ 角=\frac{(\ \ \ \ \ )}{(\ \ \ \ \ )}元$
$20\ 分=\frac{(\ \ \ \ \ )}{(\ \ \ \ \ )}时$ $9\ 分=\frac{(\ \ \ \ \ )}{(\ \ \ \ \ )}角$ $19\ 公顷=\frac{(\ \ \ \ \ )}{(\ \ \ \ \ )}平方千米$
答案:
$\frac{7}{10}$ $\frac{300}{1000}$ $\frac{8}{10}$
$\frac{35}{60}$ $\frac{150}{1000}$ $\frac{7}{10}$
$\frac{20}{60}$ $\frac{9}{10}$ $\frac{19}{100}$
三、列竖式计算。
$0.72\times0.5=$ $2.6\times1.08=$ $4.52\div0.7\approx$
(得数保留一位小数)

$22.78\div3.4=$ $0.58\times0.025=$ $8.96\div0.56=$
$0.72\times0.5=$ $2.6\times1.08=$ $4.52\div0.7\approx$
(得数保留一位小数)
$22.78\div3.4=$ $0.58\times0.025=$ $8.96\div0.56=$
答案:
0.36 2.808 6.5
6.7 0.0145 16
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