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`@` `\text {Ans}`
`\downarrow`
`a)`
\(2^{13}\cdot4^5\cdot8^2\)
`=`\(2^{13}\cdot\left(2^2\right)^5\cdot\left(2^3\right)^2\)
`=`\(2^{13}\cdot2^{10}\cdot2^6\)
`=`\(2^{29}\)
`b)`
\(100^6. 1000^4. 1000000\)\(33\)
`=`\(10^{12}\cdot10^{12}\cdot10^{198}=10^{222}\)
`c)`
\(24^5. 6^5. 8^8\)
`=`\(2^{15}\cdot3^5\cdot2^5\cdot3^5\cdot2^{24}\)
`=`\(2^{15+5+24}\cdot3^{5+5}\)
`=`\(2^{44}\cdot3^{10}\)
a, \(2^{13}\cdot4^5\cdot8^2=2^{13}\cdot2^{10}\cdot2^6=2^{19}.\)
b, \(100^6\cdot1000^4\cdot1000000^{33}=10^{12}\cdot10^{12}\cdot10^{198}=10^{222}.\)
c, \(24^5\cdot6^5\cdot8^8=2^{15}\cdot3^5\cdot2^5\cdot3^5\cdot2^{24}=2^{44}\cdot3^{10}.\)
a ) x = 1 9 + 5 7 = 52 63 b ) x = 2 15 − 3 10 = − 1 6
c ) x = 2 45 − 1 9 = − 1 15 ; d ) x = − 3 7 − 4 5 − − 2 3 = − 59 105
a)
\(a=2136\times2136=2136\times\left(2134+2\right)=2136\times2134+2136\times2\)
\(b=2134\times2138=2134\times\left(2136+2\right)=2134\times2136+2134\times2\)
Vì \(2136\times2>2134\times2\)
=> \(a>b\)
b)
=> \(a=b\)\(b=123\times246+77-=123\times\left(245+1\right)+77=123\times245+123+77=123\times245+200\)\(a=245\times124-45=245\times\left(123+1\right)-45=245\times123+245-45=245\times123+200\)
Bỏ dấu ngoặc rồi tính:
a) (123 - 27)+ (27+ 13-123) -= 123 - 27 + 27 + 13 - 123 = 13
b) (175 + 25 + 13)-(-15 + 175 + 25) = 175 + 25 + 13 + 15 - 175 - 25 = 28
c) (2012 - 119 + 29) - (-119 + 29) = 2012 - 119 + 29 + 119 - 29 = 20122
d) -(55 - 80 + 91) - (2012 + 80 - 91) = - 55 + 80 - 91 - 2012 - 80 + 91 = - 2067
e) 123 + [54 + (-123) + 46] = 123 + 54 - 123 + 46 = 100
f) - 64 + [(-110 + 64 + 71] = -64 -110 +64 + 71 = -39
Đáp án B