(-3-5)^2.(-79+82):(-2)
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1: \(23+\left(-13\right)+\left(-50\right)\)
\(=23-13-50\)
=10-50
=-40
2: \(-5+15+\left(-123\right)\)
\(=\left(-5+15\right)-123\)
=10-123
=-113
3: \(5871:\left\{928-\left[\left(-82+247\right)\right]\right\}\cdot5\)
\(=5871-\left\{928+82-247\right\}\cdot5\)
\(=5871-763\cdot5=5871-3815=2056\)
4: \(40-\left(4\cdot5^2-3\cdot2^3\right)\)
\(=40-4\cdot5^2+3\cdot2^3\)
\(=40-4\cdot25+3\cdot8\)
=40-100+24
=64-100
=-36
5: \(6^2\cdot5-7^2+149\)
\(=36\cdot5-49+149\)
\(=180+149-49\)
=180+100
=280
6: \(-210:\left[16+3\cdot\left(6+3\cdot2^2\right)\right]+\left(-2022\right)\)
\(=-210:\left[16+3\cdot\left(6+3\cdot4\right)\right]+\left(-2022\right)\)
\(=-210:\left[16+3\cdot18\right]+\left(-2022\right)\)
\(=-210:70-2022\)
=-3-2022
=-2025
7: \(5\cdot2^3+7^{11}:7^9-2023^0\cdot1^8\)
\(=5\cdot8+7^2-1\)
=40+49-1
=39+49
=88
8: \(400:\left\{5\cdot\left[360-\left(290+2\cdot5^2\right)\right]\right\}\)
\(=400:\left\{5\cdot\left[360-290-2\cdot25\right]\right\}\)
\(=400:\left\{5\cdot20\right\}\)
\(=\dfrac{400}{100}=4\)
9: \(75-\left(3\cdot5^2\right)-4\cdot5^3\)
\(=75-3\cdot25-4\cdot5^3\)
=-4*125
=-500
a: \(=36:4+2\cdot25=9+50=59\)
b: \(=79\left(82+18\right)=79\cdot100=7900\)
c: \(=49-9-\left(4^2+2^2\right)\)
\(=40-16-4=40-20=20\)
d: \(=16+\left[400:\left(200-42-138\right)\right]\)
\(=16+400:20=16+20=36\)
\(=\dfrac{2^{80}\left(1+2+2^2\right)}{2^{78}\left(1+2+2^2\right)}=2^2=4\)
Bài 1 :
a) 37581 - 9999 = 37581 - 10000 - 1 = 27581 - 1 = 27580
k cho mình nha bạn !
a)37581-9999=37581-(9999+1-1)=37581-(10000+1)=37581-10000-1=27581+1=27582
Lời giải chi tiết:
44 < 48 | 75 > 57 | 90 > 80 |
46 < 50 | 55 < 58 | 67 < 72 |
15 = 10 + 5 | 85 > 79 | 78 < 82 |
\(=85^2-84^2+83^2-82^2+81^2-80^2+79^2-78^2+77^2-76^2\)
=85+84+...+77+76
=10*(85+76)/2=805
\(\left(-3-5\right)^2.\left(-79+82\right):\left(-2\right)\)
\(=\left(-8\right)^2.3:\left(-2\right)\)
\(=64.3:\left(-2\right)\)
\(=-96\)
\(\left(-3-5\right)^2.\left(-79+82\right):\left(-2\right)\)
\(=\left(-8\right)^2.3:\left(-2\right)\)
\(=64.3.\frac{-1}{2}\)
\(=192.\frac{-1}{2}\)
\(=-96\)