42.55+2.45.8-20220
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48 : 46 - 5 . [ ( -37 )-(-24-37) ] + 20220
=42-5(-37+24+37)+1
=16-5.24+1
=16-120+1
=-103
\(4^8:4^6\) \(-5.[(-37)-(-24-37)]+\) \(2022^o.\)
\(=4^2-5.\left(-37+24+37\right)+1.\)
\(=16-5.24+1.\\ =-103.\)
\(2040-\left[10\left(4^3-56\right):2^3+2^3\right].2022^0\)
\(=2040-\left[10.8:2^3+2^3\right].1\)
\(=2040-\left(10+2^3\right)\)
\(=2040-18=2022\)
2040−[10(43−56):23+23].202202040−[10(43−56):23+23].20220
=2040−[10.8:23+23].1=2040−[10.8:23+23].1
=2040−(10+23)=2040−(10+23)
=2040−18=2022
\(\left[36\times4-4\times\left(82-7\times11\right)^2\right]:4-2022^0\\ =\left[144-4\times\left(82-77\right)^2\right]:4-1\\ =\left[144-4\times5^2\right]:4-1\\ =\left[144-4\times25\right]:4-1\\ =\left[144-100\right]:4-1\\ =44:4-1=11-1=10\)
\(\left(-48\right).54+\left(-48\right).46+480\)
\(=\left(-48\right).\left(54+46\right)+480\)
\(=\left(-48\right).100+480\)
\(=-4800+480\)
\(=-4320\)
_________
\(900:\left[50+\left(7^2-8.3\right).2\right]+2022^0\)
\(=900:\left[50+\left(49-24\right).2\right]+1\)
\(=900:\left[50+25.2\right]+1\)
\(=900:\left[50+50\right]+1\)
\(=900:100+1\)
\(=9+1=10\)
\(3^2\cdot5\left[7:1^{2022}-\left(11-9\right)^2\right]+2022^0\)
\(=9\cdot5\cdot\left(7:1-2^2\right)+1\)
\(=9\cdot5\cdot\left(7-4\right)+1\)
\(=45\cdot3+1\)
\(=135+1\)
\(=136\)
a: \(\left(-150\right):\left(-5\right)-2\cdot5^2\)
\(=\dfrac{150}{5}-2\cdot25\)
=30-50
=-20
b: \(2040-\left[10\cdot\left(4^3-46\right):18+2^3\right]\cdot2022^0\)
\(=2040-\left[10\cdot\left(64-46\right):18+8\right]\)
\(=2040-\left[10\cdot18:18+8\right]\)
\(=2040-10-8=2030-8=2022\)
16.55+2.45.8-1
= 880+720-1
= 1599
còn nếu tính nhanh thì sẽ là:
= (22)2 . 55 + 2 . 23 .45 - 1
= 24 . ( 45 +55 ) -1
= 16 . 100 -1
= 1599