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一、口算。
$36÷\frac{3}{4}=$
$\frac{3}{2}-\frac{3}{8}=$
$\frac{5}{8}-\frac{1}{10}=$
$3.15+0.76=$
$0.05×0.3=$
$\frac{1}{14}+\frac{4}{5}=$
$125×0.8=$
$3.8÷0.19=$
$36÷\frac{3}{4}=$
48
$\frac{4}{5}+\frac{2}{7}=$$\dfrac{38}{35}$
$\frac{3}{7}-\frac{1}{21}=$$\dfrac{8}{21}$
$\frac{3}{2}-\frac{3}{8}=$
$\dfrac{9}{8}$
$\frac{3}{40}×\frac{5}{8}=$$\dfrac{3}{64}$
$1.26+8.74=$10
$\frac{5}{8}-\frac{1}{10}=$
$\dfrac{21}{40}$
$\frac{10}{27}÷\frac{4}{9}=$$\dfrac{5}{6}$
$3.8-2.8=$1
$3.15+0.76=$
3.91
$\frac{3}{16}÷37.5\%=$$\dfrac{1}{2}$
$\frac{7}{22}+\frac{3}{11}=$$\dfrac{13}{22}$
$0.05×0.3=$
0.015
$2-\frac{2}{9}=$$1\dfrac{7}{9}$
$\frac{4}{7}÷\frac{1}{9}=$$\dfrac{36}{7}$
$\frac{1}{14}+\frac{4}{5}=$
$\dfrac{61}{70}$
$\frac{18}{5}×\frac{2}{3}=$$\dfrac{12}{5}$
$\frac{7}{9}×\frac{45}{49}=$$\dfrac{5}{7}$
$125×0.8=$
100
$\frac{1}{4}÷\frac{4}{7}=$$\dfrac{7}{16}$
$460-99=$361
$3.8÷0.19=$
20
$\frac{4}{5}-\frac{1}{4}=$$\dfrac{11}{20}$
$\frac{2}{9}÷\frac{8}{5}=$$\dfrac{5}{36}$
答案
周四
一、48 $\dfrac{38}{35}$ $\dfrac{8}{21}$ $\dfrac{9}{8}$ $\dfrac{3}{64}$ 10 $\dfrac{21}{40}$ $\dfrac{5}{6}$ 1 3.91 $\dfrac{1}{2}$ $\dfrac{13}{22}$ 0.015 $1\dfrac{7}{9}$ $\dfrac{36}{7}$ $\dfrac{61}{70}$ $\dfrac{12}{5}$ $\dfrac{5}{7}$ 100 $\dfrac{7}{16}$ 361 20 $\dfrac{11}{20}$ $\dfrac{5}{36}$
一、48 $\dfrac{38}{35}$ $\dfrac{8}{21}$ $\dfrac{9}{8}$ $\dfrac{3}{64}$ 10 $\dfrac{21}{40}$ $\dfrac{5}{6}$ 1 3.91 $\dfrac{1}{2}$ $\dfrac{13}{22}$ 0.015 $1\dfrac{7}{9}$ $\dfrac{36}{7}$ $\dfrac{61}{70}$ $\dfrac{12}{5}$ $\dfrac{5}{7}$ 100 $\dfrac{7}{16}$ 361 20 $\dfrac{11}{20}$ $\dfrac{5}{36}$
二、求未知角的度数。
答案
二、$∠ 1 = 180^{\circ} - 40^{\circ} - 90^{\circ} = 50^{\circ}$
$∠ 2 = 360^{\circ} - 90^{\circ} - 130^{\circ} = 140^{\circ}$
$∠ 2 = 360^{\circ} - 90^{\circ} - 130^{\circ} = 140^{\circ}$
