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Mk mak lm mấy cái con toán này
Thì mk sáng mai cx ko lm xng đôu
Bấm mẹ máy tính cho nó nhanh
K mk
\(a)\)\(\frac{10^{12}+5^{11}.2^9-5^{13}.2^8}{4.5^5.10^6}\)
\(=\)\(\frac{2^{12}.5^{12}+2^9.5^{11}-2^8.5^{13}}{2^8.5^{11}}\)
\(=\)\(\frac{2^8.5^{11}\left(2^4.5+2-5^2\right)}{2^8.5^{11}}\)
\(=\)\(2^4.5+2-5^2\)
\(=\)\(80+2-25\)
\(=\)\(57\)
Chúc bạn học tốt ~
Giải:
\(\left(10^{12}+5^{11}.2^9-5^{13}.2^8\right):4.5^5.10^6\)
\(=\left(10^{12}+10^9.5^2-10^8.5^5\right):5^3.10^8\)
\(=10^8\left(10^4+10.5^2-5^5\right):5^3.10^8\)
\(=\dfrac{10^8\left(10^4+10.5^2-5^5\right)}{5^3.10^8}\)
\(=\dfrac{10^4+10.5^2-5^5}{5^3}\)
\(=\dfrac{5^3\left(2^3.10+2-5^2\right)}{5^3}\)
\(=80+2-25=57\)
Vậy ...
\(\left(10^{12}+5^{11}.2^9-5^{13}.2^8\right):4.5^5.10^6\)
\(=\left(5^{12}.2^{12}+5^{11}.2^9-5^{13}.2^8\right):2^2.5^5.2^6.5^6\)
\(=\left[5^{11}.2^8\left(5.2^4+2-5^2\right)\right]:2^8.5^{11}\)
\(=\frac{5^{11}.2^8\left(5.16+2-25\right)}{5^{11}.2^8}\)
\(=80+2-25\)
\(=57\)
20) -5-(x + 3) = 2 - 5x ⇔ -5 - x - 3 = 2 -5x ⇔ 4x = 10 ⇔ x = \(\frac{5}{2}\)
Vậy...
a: Ta có: \(\left(8\cdot5^7+5^6-5^5\right):5^5\)
\(=8\cdot5^2+5-1\)
\(=200+4=204\)
b: Ta có: \(\left(9^{30}-27^{19}\right):3^{57}+\left(125^9-25^{12}\right):5^{24}\)
\(=3^{60}:3^{57}-3^{57}:3^{57}+5^{27}:5^{24}-5^{24}:5^{24}\)
\(=27-1+125-1\)
=150
a. (8,57 - 55 + 56) : 55
= (8,57 : 55) - (55 : 55) + (56 : 55)
= 1,72 - 1 + 5
= 2,89 - 1 + 5
= 6,89
b. (930 - 2719) : 357 + (1259 - 2512) : 524
= (930 : 357) - (2719 : 357) + (1259 : 524) - (2512 : 524)
= 33 - 1 + 125 - 1
= 27 - 1 + 125 - 1
= 150
c. (1012 + 511 . 29 - 513 - 28) : 4 . 55 . 106
= (1012 + 2,5 , 1010 - 513 - 28) : 1,25 . 1010
= (1012 : 1,25 . 1010) + (2,5 . 1010 : 1,25 . 1010) - (513 : 1,25 . 1010) - (28 : 1,25 . 1010)
= 80 + 2 - \(\dfrac{25}{256}\) - \(\dfrac{1}{48828125}\)
= 81,90234373 \(\approx\) 82