Giải bài tập 2 trang 88 vbt Toán 4 tập 2 Cánh diều
Bài tập 2 trang 88 vbt Toán 4 tập 2 Cánh diều
Tính:
a) $\frac{2}{3}+\frac{4}{3}$ $\frac{9}{8}-\frac{1}{8}$
$\frac{1}{6}+\frac{2}{3}$ $\frac{3}{4}-\frac{7}{16}$
b) $9+\frac{2}{7}$ $\frac{3}{8}+10$
$7-\frac{2}{11}$ $\frac{25}{4}-5$
c) $\frac{2}{3}\times \frac{1}{4}$ $\frac{7}{11}\times\frac{11}{2}$
$\frac{3}{7}:\frac{4}{9}$ $\frac{9}{8}:\frac{3}{4}$
d) $8\times \frac{3}{7}$ $\frac{3}{10}\times 6$
$6:\frac{5}{24}$ $\frac{18}{7}:3$
a) $\frac{2}{3}+\frac{4}{3}=\frac{6}{3}$ = 2
$\frac{9}{8}-\frac{1}{8}=\frac{8}{8}=1$
$\frac{1}{6}+\frac{2}{3}=\frac{1}{6}+\frac{4}{6}=\frac{5}{6}$
$\frac{3}{4}-\frac{7}{16}=\frac{12}{16}-\frac{7}{16}=\frac{5}{16}$
b) $9+\frac{2}{7}=\frac{63}{7}+\frac{2}{7}=\frac{65}{7}$
$\frac{3}{8}+10=\frac{3}{8}+\frac{80}{8}=\frac{83}{8}$
$7-\frac{2}{11}=\frac{77}{11}-\frac{2}{11}=\frac{75}{11}$
$\frac{25}{4}-5=\frac{25}{4}-\frac{20}{4}=\frac{5}{4}$
c) $\frac{2}{3}\times \frac{1}{4}=\frac{2}{12}=\frac{1}{6}$
$\frac{7}{11}x\frac{11}{2}=\frac{7}{2}$
$\frac{3}{7}:\frac{4}{9}=\frac{3}{7}\times \frac{9}{4}=\frac{27}{28}$
$\frac{9}{8}:\frac{3}{4}=\frac{9}{8}\times \frac{4}{3}=\frac{36}{24}=\frac{3}{2}$
d) $8\times \frac{3}{7}=\frac{24}{7}$
$\frac{3}{10}\times 6=\frac{18}{10}=\frac{9}{5}$
$6:\frac{5}{24}=6\times \frac{24}{5}=\frac{144}{5}$
$\frac{18}{7}:3=\frac{18}{7}\times \frac{1}{3}=\frac{6}{7}$
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