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125(28+72)-25(3^2.4+64)
=125.100-25(9.4+64)
=125.100-25.(36+64)
=125.100-25.100
=12500-2500
=10000
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\(5^2+3^2-\left(5^{16}:25^7+3^4:3\right)=25+9-\left[5^{16}:\left(5^2\right)^7+27\right]\)
\(=25+9-\left[5^{16}:5^{14}+27\right]\)
\(=25+9-\left[25+27\right]\)
\(=-18\)
_Học tốt nha_
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Giải:
a) \(4.2^5:\left(2^3.\dfrac{1}{16}\right)\)
\(=4.2^5:\dfrac{2^3}{16}\)
\(=2^2.2^5:\dfrac{2^3}{2^4}\)
\(=2^7:\dfrac{1}{2}\)
\(=2^6=64\)
Vậy ...
b) \(\dfrac{8^5.10^4.25^3}{16^4.625^3}\)
\(=\dfrac{2^{15}.2^4.5^4.5^6}{2^8.5^{12}}\)
\(=\dfrac{2^{19}.5^{10}}{2^8.5^{12}}\)
\(=\dfrac{2^{11}}{5^2}\)
Vậy ...
c) \(C=2^{200}-2^{199}+2^{198}-2^{197}+...+2^2-2\)
\(\Leftrightarrow C=\left(2^{200}-2^{199}\right)+\left(2^{198}-2^{197}\right)+...+\left(2^2-2\right)\)
\(\Leftrightarrow C=2^{199}\left(2-1\right)+2^{197}\left(2-1\right)+...+2\left(2-1\right)\)
\(\Leftrightarrow C=2^{199}+2^{197}+...+2\)
\(\Leftrightarrow4C=2^{201}+2^{199}+...+2^3\)
\(\Leftrightarrow3C=4C-C=2^{201}-2\)
\(\Leftrightarrow C=\dfrac{2^{201}-2}{3}\)
Vậy ...
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7: =6-7+4-3=0
8: =8x5-9x4+4x6=40-36+24=28
3: =231+26-209-26=22
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a) \(\left[\left(25-2^2.3\right)+\left(3^2.4+16\right)\right]:5\)
\(=\left[\left(25-4.3\right)\right]+\left(9.4+16\right):5\)
\(=\left[\left(25-12\right)+\left(36+16\right)\right]:5\)
\(=\left[13+52\right]:5\)
\(=65:5\)
\(=13\)
b)\(125\left(28+72\right)-25\left(3^2.4+64\right)\)
\(=125.100-25\left(9.4+64\right)\)
\(=12500-25.\left(36+64\right)\)
\(=12500-25.100\)
\(=12500-2500\)
\(=10000\)
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\(4.\left\{3^2\left[\left(5^2+2^3\right):11\right]-26\right\}+2010=4.\left\{3^2\left[\left(25+8\right):11\right]-26\right\}+2010\)
\(4\left\{3^2\left[33:11\right]-26\right\}+2010=4.\left\{3^2.3-26\right\}+2010=4\left\{27-26\right\}+2010\)
\(=4.1+2010=2014\)
\(\left[\left(25-2^2.3\right)+\left(3^2.4+16\right)\right]:5=\left[\left(25-4.3\right)+\left(9.4+16\right)\right]:5\)
\(=\left[\left(25-12\right)+\left(36+16\right)\right]:5=\left[13+52\right]:5=65:5=13\)
[(25 - 22 . 3) + (32 . 4 + 16)] : 5
= [(25 - 4 . 3) + (9 . 4 + 16)] : 5
= [(25 - 12) + (36 + 16)] : 5
= [13 + (36 + 16)] : 5
= [13 + 52] : 5
= 65 : 5
= 13
Dễ mà: [ ( 25 - 22.3) + ( 32 .4+16) : 5
= [ ( 25 - 4.3) + ( 9.4+16) :5
= [ ( 25 - 12) + ( 36 + 16) : 5
= [ 13 + 52] : 5
= 65 : 5
= 13
Tick mình cái nha!