Thực hiện phép tính: a) $(-\frac{3}{2})^2+|-\frac{5}{6}|-1\frac{1}{2}:6$ b) $(-\frac{2}{3})^2.\frac{9}{16}-\sqrt{\frac{4}{81}}:\frac{16}{9}+(-2019)^{0}$
2 câu trả lời
`a)`
`( -3/2 )^2 + | -5/6 | - 1 1/2 : 6`
`= 9/4 + 5/6 - 3/2. 1/6`
`= 37/12 - 1/4`
`= 37/12 - 3/12`
`= 17/6`
`b)`
`( -2/3 )^2. 9/16 - \sqrt{4/81} : 16/9 + ( -2019 )^0`
`= 4/9. 9/16 - 2/9. 9/16 + 1`
`= 1/4 - 1/8 + 1`
`= 1/8 + 1`
`= 9/8`
Đáp án:
`a)` `17/6` `b)` `9/8`
Giải thích các bước giải:
`a)` `(-3/2)²+|-5/6|-1 1/2:6`
`=9/4+5/6-3/2*1/6`
`=9/4+5/6-1/4`
`=8/4+5/6`
`=2+5/6`
`=(12+5)/6`
`=17/6`
`b)` `(-2/3)²*9/16-\sqrt{4/81}:16/9+(-2019)⁰`
`=4/9*9/16-2/9*9/16+1`
`=2/8-1/8+1`
`=1/8+1`
`=9/8`
