Đáp án:
a/ `\frac{1}{36}`
b/ `\frac{1}{144}`
c/ `\frac{7}{216}`
d/ `648`
Giải thích các bước giải:
a/ `(\frac{1}{2}-\frac{1}{3})^2`
`=(\frac{3-2}{6})^2`
`=(\frac{1}{6})^2`
`=\frac{1}{36}`
b/ `(\frac{3}{4}-\frac{5}{6})^2`
`=(\frac{9-10}{12})^2`
`=(\frac{-1}{12})^2`
`=\frac{1}{144}`
c/ `(1+\frac{1}{2}-\frac{1}{3}).(\frac{2}{3}-\frac{1}{2})^2`
`=\frac{6+3-2}{6}.(\frac{4-3}{6})^2`
`=\frac{7}{6}.\frac{1}{36}`
`=\frac{7}{216}`
d/ `3:(\frac{1}{3}-\frac{1}{2})^3`
`=3:(\frac{2-3}{6})^3`
`=3:(\frac{-1}{6})^3`
`=3:\frac{1}{216}`
`=3.216`
`=648`
Chúc bạn học tốt !!!