Giải câu 2 trang 41 VBT toán 5 tập 1

Bài 2: Trang 41 VBt toán 5 tập 1

Tính:

a) + $\frac{3}{8}$ + $\frac{5}{16}$ = ........................................

b) - $\frac{1}{3}$ - $\frac{1}{6}$ = .........................................

c) x $\frac{5}{8}$ x $\frac{7}{12}$ = .........................................

d) : $\frac{15}{14}$ x $\frac{6}{7}$ = .........................................

Bài làm:

a) + $\frac{3}{8}$ + $\frac{5}{16}$ = $\frac{4}{16}$ + $\frac{6}{16}$ + $\frac{5}{16}$ = $\frac{15}{16}$

b) - $\frac{1}{3}$ - $\frac{1}{6}$ = $\frac{18}{30}$ - $\frac{10}{30}$ - $\frac{5}{30}$ = $\frac{3}{30}$ = $\frac{1}{10}$

c) x $\frac{5}{8}$ x $\frac{7}{12}$ = $\frac{20}{56}$ x $\frac{7}{12}$ = $\frac{140}{672}$ = $\frac{5}{24}$

d) : $\frac{15}{14}$ x $\frac{6}{7}$ = x $\frac{14}{15}$ x $\frac{6}{7}$ = $\frac{5\times \text{⧸}5\times \text{⧸}2\times \text{⧸}7}{2\times \text{⧸}2\times \text{⧸}7\times \text{⧸}5\times 3}$ x $\frac{6}{7}$ = $\frac{5}{6}$ x $\frac{6}{7}$ = $\frac{5}{7}$