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一、口算。
$1.91 - 0.1 =$
$0.64 + 2.65 =$
$7070÷35 =$
$\frac{3}{4}×25\% =$
$15÷\frac{3}{5} =$
$\frac{2}{7} - \frac{2}{35} =$
$25\%÷5 =$
$1.91 - 0.1 =$
1.81
$3.14×\frac{1}{2} =$1.57
$2.29 - 0.75 - 1.29 =$0.25
$0.64 + 2.65 =$
3.29
$\frac{5}{36}×\frac{9}{20} =$$\dfrac{1}{16}$
$\frac{1}{11}×99 + \frac{1}{11} =$$\dfrac{100}{11}$
$7070÷35 =$
202
$9.03 - 4.76 =$4.27
$120×(\frac{1}{6} + \frac{1}{4}) =$50
$\frac{3}{4}×25\% =$
$\dfrac{3}{16}$
$1.68÷0.02 =$84
$\frac{1}{7}×7÷\frac{1}{7}×7 =$49
$15÷\frac{3}{5} =$
25
$1.5×400 =$600
$30\%×4÷6 =$0.2
$\frac{2}{7} - \frac{2}{35} =$
$\dfrac{8}{35}$
$\frac{3}{11} + \frac{5}{22} =$$\dfrac{1}{2}$
$9.04 - (4.04 - 1.8) =$6.8
$25\%÷5 =$
5%
$\frac{1}{4} - \frac{3}{16} =$$\dfrac{1}{16}$
$8.5 + 7.7 - 5.5 =$10.7
答案
一、1.81 1.57 0.25
3.29 $\dfrac{1}{16}$ $\dfrac{100}{11}$
202 4.27 50
$\dfrac{3}{16}$ 84 49
25 600 0.2
$\dfrac{8}{35}$ $\dfrac{1}{2}$ 6.8
5% $\dfrac{1}{16}$ 10.7
3.29 $\dfrac{1}{16}$ $\dfrac{100}{11}$
202 4.27 50
$\dfrac{3}{16}$ 84 49
25 600 0.2
$\dfrac{8}{35}$ $\dfrac{1}{2}$ 6.8
5% $\dfrac{1}{16}$ 10.7
二、计算下面各题，怎样简便就怎样计算。
$\frac{37}{50}×101 - \frac{37}{50}$ $\frac{7}{10}×(1 - \frac{5}{14}÷\frac{5}{7})$ $(\frac{7}{9} + \frac{2}{15} - \frac{2}{3})÷\frac{1}{45}$
$(\frac{2}{3} + \frac{3}{8}×\frac{4}{5})÷(\frac{5}{6} - \frac{4}{15})$ $58.8÷(10.3 - 1.9)×15$
$\frac{37}{50}×101 - \frac{37}{50}$ $\frac{7}{10}×(1 - \frac{5}{14}÷\frac{5}{7})$ $(\frac{7}{9} + \frac{2}{15} - \frac{2}{3})÷\frac{1}{45}$
$(\frac{2}{3} + \frac{3}{8}×\frac{4}{5})÷(\frac{5}{6} - \frac{4}{15})$ $58.8÷(10.3 - 1.9)×15$
答案
二、74 $\dfrac{7}{20}$ 11
$\dfrac{29}{17}$ 105
$\dfrac{29}{17}$ 105
