Bài 1: Trang 16 VBT toán 5 tập 1
Tính:
a) $\frac{8}{5}$ + $\frac{3}{10}$ = .............................................
b) $\frac{2}{3}$ + $\frac{3}{4}$ + $\frac{1}{6}$ = .......................
c) $\frac{5}{6}$ - $\frac{2}{9}$ = ................................................
d) $2\frac{1}{10}$ - $\frac{3}{4}$ - $\frac{2}{5}$ = .....................
Bài Làm:
a) $\frac{8}{5}$ + $\frac{3}{10}$ = $\frac{80}{50}$ + $\frac{15}{50}$ = $\frac{95}{50}$ = $\frac{19}{10}$
b) $\frac{2}{3}$ + $\frac{3}{4}$ + $\frac{1}{6}$ = $\frac{8}{12}$ + $\frac{9}{12}$ + $\frac{2}{12}$ = $\frac{19}{12}$
c) $\frac{5}{6}$ - $\frac{2}{9}$ = $\frac{45}{54}$ - $\frac{12}{54}$ = $\frac{33}{54}$
d) $2\frac{1}{10}$ - $\frac{3}{4}$ - $\frac{2}{5}$ = $\frac{21}{10}$ - $\frac{3}{4}$ - $\frac{2}{5}$ = $\frac{42}{20}$ - $\frac{15}{20}$ - $\frac{8}{20}$ = $\frac{19}{20}$