Thực hiện phép tính
2017^0+|3/5-1|:4/5-5/6
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a) 48 . 19 + 48 .115 + 134 .52
= 48 . ( 19 + 115) + 134 . 52
= 48 . 134 + 134 . 52
= 134 . ( 48+52)
= 134 . 100
= 13400
b) 5^6 : 5^4 + 2^3 . 2^2 - 1^2017
= 5^2 + 2^5 - 1
= 25 + 32 - 1
= 56
câu b mình ko biết nên bạn thông cảm đen lại minh xe tăng bạn :
1 bộ váy:
hãy kb với mình nhé
`1//([-1]/2)^2 . |+8|-(-1/2)^3:|-1/16|=1/4 .8+1/8 .16=2+2=4`
`2//|-0,25|-(-3/2)^2:1/4+3/4 .2017^0=0,25-2,25.4+0,75.1=0,25-9+0,75=-8,75+0,75-8`
`3//|2/3-5/6|.(3,6:2 2/5)^3=|-1/6|.(3/2)^3=1/6 . 27/8=9/16`
`4//|(-0,5)^2+7/2|.10-(29/30-7/15):(-2017/2018)^0=|1/4+7/2|.10-1/2:1=|15/4|.10-1/2=15/4 .10-1/2=75/2-1/2=37`
`5// 8/3+(3-1/2)^2-|[-7]/3|=8/3+(5/2)^2-7/3=8/3+25/4-7/3=107/12-7/3=79/12`
1) 5 + (-4) = 1
2) (-8) + 2 = -6
3) 8 + (-2) = 6
4) 11 + (-3) = 8
5) (-11) + 2 = -9
6) (-7) + 3 = -4
7) (-5) + 5 = 0
8) 11 + (-12) = -1
9) (-18) + 20 = 2
10) (15) + (-12) = 3
11) (-17) + 17 = 0
12) 16 + (-2) = 14
13) (30) + (-14) = 16
14) (-19) + 20 = 1
15) (-18) + 15 = -3
16) (10) + (-6) = 4
17) (-28) + 14 = -14
18) 15 + (-30) = -15
19) (15) + (-4) = 11
20) (-21) + 11 = -10
21) 8 + (-22) = -14
22) (-15) + 4 = -11
23) (-3) + 2 = -1
24) 17 + (-14) = 3
25) 17 + (-14) = 3
a) 48. ( 19 + 115 ) + 134 . 52
= 48 . 134 + 134 . 52
= 134. ( 48 + 52 )
= 134 . 100
= 13400
b) 52 + 25 - 1
= 25 + 32 - 1
= 57 - 1
= 56
Hk tốt
a) 48 . 19 + 48 . 115 + 134 . 52 b) 56 : 54 + 23 . 22 - 12017
= 48 . ( 19 + 115 ) + 134 . 52 = 52 + 25 - 12017
= 48 . 134 + 134 . 52 = 25 + 32 - 1
= 134 . 100 = 56
= 13 400
\(\frac{0,5+\frac{2}{43}-\frac{2}{2017}}{\frac{3}{4}+\frac{3}{43}-\frac{3}{2017}}:\frac{\frac{4}{91}+\frac{4}{34}+\frac{4}{2017}}{\frac{5}{91}+\frac{5}{34}+\frac{5}{2017}}\)
\(=\frac{\frac{2}{4}+\frac{2}{43}-\frac{2}{2017}}{\frac{3}{4}+\frac{3}{43}-\frac{3}{2017}}:\frac{4\left(\frac{1}{91}+\frac{1}{34}+\frac{1}{2017}\right)}{5\left(\frac{1}{91}+\frac{1}{34}+\frac{1}{2017}\right)}\)
\(=\frac{2\left(\frac{1}{4}+\frac{1}{43}-\frac{1}{2017}\right)}{3\left(\frac{1}{4}+\frac{1}{43}-\frac{1}{2017}\right)}:\frac{4}{5}\)
\(=\frac{2}{3}.\frac{5}{4}=\frac{5}{6}\)
a,\(\frac{7}{10}\cdot\frac{4}{9}+\frac{3}{10}\cdot\frac{4}{9}-1\frac{7}{9}\)
\(=\frac{14}{45}+\frac{2}{15}-\frac{16}{9}\)
\(=\frac{14}{45}+\frac{6}{45}-\frac{80}{45}\)
\(=\frac{-60}{45}=\frac{-4}{3}\)
b,\(\frac{-5}{6}+\frac{4}{9}\cdot\left(\frac{5}{4}-\frac{2}{3}\right)\cdot\left(-3\right)^2+\frac{5}{9}\cdot30\%\)
\(=\frac{-5}{6}+\frac{4}{9}\cdot\left(\frac{7}{12}\right)\cdot9+\frac{5}{9}\cdot\frac{3}{10}\)
\(=\frac{-5}{6}+\frac{7}{3}+\frac{1}{6}\)
\(=\frac{-5}{6}+\frac{14}{6}+\frac{1}{6}\)
=\(=\frac{10}{6}=\frac{5}{3}\)
\(2017^0+\text{|}\frac{3}{5}-1\text{|}:\frac{4}{5}-\frac{5}{6}\)
\(=1+\text{|}\frac{3}{5}-\frac{5}{5}\text{|}:\frac{4}{5}-\frac{5}{6}\)
\(=1+\text{|}\frac{-2}{5}\text{|}:\frac{4}{5}-\frac{5}{6}\)
\(=1+\frac{2}{5}:\frac{4}{5}-\frac{5}{6}\)
\(=1+\frac{2}{5}.\frac{5}{4}-\frac{5}{6}\)
\(=1+\frac{1}{2}-\frac{5}{6}\)
\(=\frac{6}{6}+\frac{3}{6}-\frac{5}{6}\)
\(=\frac{4}{6}=\frac{2}{3}\)