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一、口算。
$0.8×1.5=$
$4.8÷0.16=$
$\frac{6}{25}×\frac{5}{18}=$
$3.6÷0.5=$
$0.6÷0.02=$
$3.6+1.5=$
$\frac{4}{15}÷\frac{6}{5}=$
$0.8×1.5=$
1.2
$\frac{5}{9}÷\frac{5}{7}=$$\dfrac{7}{9}$
$\frac{3}{4}+\frac{9}{10}=$$\dfrac{33}{20}$
$4.8÷0.16=$
30
$\frac{2}{3}-\frac{5}{8}=$$\dfrac{1}{24}$
$480×20\%=$96
$\frac{6}{25}×\frac{5}{18}=$
$\dfrac{1}{15}$
$3.14×0.4=$1.256
$\frac{4}{15}+\frac{2}{5}=$$\dfrac{2}{3}$
$3.6÷0.5=$
7.2
$1-0.82=$0.18
$\frac{3}{25}×\frac{5}{12}=$$\dfrac{1}{20}$
$0.6÷0.02=$
30
$0.9×200=$180
$9.1-1.08=$8.02
$3.6+1.5=$
5.1
$5÷10\%=$50
$\frac{2}{3}+\frac{1}{7}=$$\dfrac{17}{21}$
$\frac{4}{15}÷\frac{6}{5}=$
$\dfrac{2}{9}$
$282-156=$126
$0.375×4=$$\dfrac{3}{2}$
答案
一、1.2 $\dfrac{7}{9}$ $\dfrac{33}{20}$
30 $\dfrac{1}{24}$ 96
$\dfrac{1}{15}$ 1.256 $\dfrac{2}{3}$
7.2 0.18 $\dfrac{1}{20}$
30 180 8.02
5.1 50 $\dfrac{17}{21}$
$\dfrac{2}{9}$ 126 $\dfrac{3}{2}$
30 $\dfrac{1}{24}$ 96
$\dfrac{1}{15}$ 1.256 $\dfrac{2}{3}$
7.2 0.18 $\dfrac{1}{20}$
30 180 8.02
5.1 50 $\dfrac{17}{21}$
$\dfrac{2}{9}$ 126 $\dfrac{3}{2}$
二、解方程。
$\frac{4}{5}-x=\frac{3}{5}$ $x+40\%x=28$ $2.5×8+4x=100$
$\frac{5}{6}x-\frac{4}{5}x=15$ $18x÷0.3=9$ $x÷(\frac{5}{6}-\frac{3}{8})=\frac{3}{22}$
$\frac{4}{5}-x=\frac{3}{5}$ $x+40\%x=28$ $2.5×8+4x=100$
$\frac{5}{6}x-\frac{4}{5}x=15$ $18x÷0.3=9$ $x÷(\frac{5}{6}-\frac{3}{8})=\frac{3}{22}$
答案
二、$x=\dfrac{1}{5}$ $x=20$ $x=20$
$x=450$ $x=0.15$ $x=\dfrac{1}{16}$
$x=450$ $x=0.15$ $x=\dfrac{1}{16}$
