一、口算。
$\frac{7}{8}-\frac{4}{5}=$
$0.35× 0.6=$
$\frac{4}{7}÷ 40\%=$
$3.64-1.8=$
$9.8÷ 0.14=$
$\frac{3}{2}× \frac{2}{25}=$
$4.7× 0.3=$
$\frac{6}{7}+\frac{8}{21}=$
$\frac{7}{11}-\frac{7}{33}=$
$\frac{1}{6}÷ \frac{3}{4}=$
$2.45× 0.6=$
$\frac{8}{5}÷ \frac{3}{10}=$
$2.4× 0.4=$
$1-46\%=$
$\frac{2}{3}+\frac{7}{8}=$
$20.5÷ 5=$
$3.5× 0.9=$
$3÷ 0.375=$
$\frac{4}{9}÷ \frac{2}{15}=$
$2.85+4.75=$
$2-\frac{13}{10}=$
$\frac{7}{8}-\frac{4}{5}=$
$\frac {3}{40}$
$0.35× 0.6=$
0.21
$\frac{4}{7}÷ 40\%=$
$\frac {10}{7}$
$3.64-1.8=$
1.84
$9.8÷ 0.14=$
70
$\frac{3}{2}× \frac{2}{25}=$
$\frac {3}{25}$
$4.7× 0.3=$
1.41
$\frac{6}{7}+\frac{8}{21}=$
$\frac {26}{21}$
$\frac{7}{11}-\frac{7}{33}=$
$\frac {14}{33}$
$\frac{1}{6}÷ \frac{3}{4}=$
$\frac {2}{9}$
$2.45× 0.6=$
1.47
$\frac{8}{5}÷ \frac{3}{10}=$
$\frac {16}{3}$
$2.4× 0.4=$
0.96
$1-46\%=$
0.54
$\frac{2}{3}+\frac{7}{8}=$
$\frac {37}{24}$
$20.5÷ 5=$
4.1
$3.5× 0.9=$
3.15
$3÷ 0.375=$
8
$\frac{4}{9}÷ \frac{2}{15}=$
$\frac {10}{3}$
$2.85+4.75=$
7.6
$2-\frac{13}{10}=$
$\frac {7}{10}$
答案
一、$\frac {3}{40}$ 0.21 $\frac {10}{7}$
1.84 70 $\frac {3}{25}$
1.41 $\frac {26}{21}$ $\frac {14}{33}$
$\frac {2}{9}$ 1.47 $\frac {16}{3}$
0.96 0.54 $\frac {37}{24}$
4.1 3.15 8
$\frac {10}{3}$ 7.6 $\frac {7}{10}$
1.84 70 $\frac {3}{25}$
1.41 $\frac {26}{21}$ $\frac {14}{33}$
$\frac {2}{9}$ 1.47 $\frac {16}{3}$
0.96 0.54 $\frac {37}{24}$
4.1 3.15 8
$\frac {10}{3}$ 7.6 $\frac {7}{10}$
二、计算下面各题,怎样简便就怎样计算。
$4.8× 96+4.8÷ 25\%$
$46× 49+46× 50+46$
$\frac{1}{5}÷ [(\frac{2}{3}+\frac{1}{5})× \frac{1}{13}]$
$(\frac{3}{4}-\frac{1}{8}+\frac{5}{12})× 72$
$\frac{17}{16}-\frac{9}{14}× \frac{1}{3}-\frac{11}{14}$
$4.8× 2.5÷ (4.62-4.12)$
$4.8× 96+4.8÷ 25\%$
$46× 49+46× 50+46$
$\frac{1}{5}÷ [(\frac{2}{3}+\frac{1}{5})× \frac{1}{13}]$
$(\frac{3}{4}-\frac{1}{8}+\frac{5}{12})× 72$
$\frac{17}{16}-\frac{9}{14}× \frac{1}{3}-\frac{11}{14}$
$4.8× 2.5÷ (4.62-4.12)$
答案
二、480 4600 3
75 $\frac {1}{16}$ 24
75 $\frac {1}{16}$ 24
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