3^3.22-3^3.19 = ?
{210:[16+3.(6+3.22)]}–3
\(\left\{210:\left[16+3.\left(6+3.22\right)\right]\right\}-3\)
\(=\left\{210:\left[16+3.\left(6+66\right)\right]\right\}-3\)
\(=\left\{210:\left[16+3.72\right]\right\}-3\)
\(=\left\{210:\left[16+216\right]\right\}-3\)
\(=\left\{210:232\right\}-3\)
\(=\dfrac{105}{116}-3\)
\(=\dfrac{-243}{116}\)
bài 1 thực hiện phép tính
{210:[16+3.(6+3.22)]}-3
\(\left\{210:\left[16+3.\left(6+3.2^2\right)\right]\right\}-3\)
\(=\left\{210:\left[16+3.\left(6+3.4\right)\right]\right\}-3\)
\(=\left\{210:\left[16+3.\left(6+12\right)\right]\right\}-3\)
\(=\left\{210:\left[16+3.18\right]\right\}-3\)
\(=\left\{210:\left[16+54\right]\right\}-3\)
\(=\left\{210:70\right\}-3\)
\(=3-3\)
\(=0\)
3^2+2^4.3^3.19+3^5 giúp em với
\(3^2+2^4.3^3.19+3^5=9+16.27.19+243=9+8208+243=8460\)
32 + 24 . 33 .19 + 35
= 9 + 16 . 27 . 19 + 243
= 9 + 8208 + 243
= 8460
#Học tốt!!!
~NTTH~
60%x+2/3x=1/3.19/3
\(60\%x+\frac{2}{3}x=\frac{1}{3}\cdot\frac{19}{3}\)
\(\Rightarrow\frac{3}{5}x+\frac{2}{3}x=\frac{19}{9}\)
\(\Rightarrow(\frac{3}{5}+\frac{2}{3})x=\frac{19}{9}\)
\(\Rightarrow\frac{19}{15}x=\frac{19}{9}\)
\(\Rightarrow x=\frac{19}{9}:\frac{19}{15}=\frac{95}{57}\)
Vậy \(x=\frac{95}{57}\)
a)2 ngũ 3.19:24+2 ngũ 3 .5
Thực hiện phép tính:
a) 27 . 75 + 25 . 27 - 150
b) 375 : { 32 - [ 4 + ( 5 . 3 2 - 42 ) ] } - 14
c) 142 - [ 50 - ( 2 3 . 10 - 2 3 . 5 ) ]
d) { 210 : [ 16 + 3 . ( 6 + 3 . 2 2 ) ] } - 3
a 27 . 75 + 25 . 27 - 150
= 27 . ( 75 + 25 ) - 150
= 27 . 100 - 150
= 2700 - 150
2550
rút gọn rồi quy đồng
3.32-3.19 / 12+8.5 và 33.25 / 26.35
tìm x
a) 5. (x – 1)3 = 40
b) 3x + 1 + 9x = 324
c) 5x – 13 = 3.22
d) 8x + 23x + 1 = 192
`#3107.101107`
a)
\(5\left(x-1\right)^3=40\\\Rightarrow\left(x-1\right)^3=40\div5\\ \Rightarrow\left(x-1\right)^3=8\\ \Rightarrow\left(x-1\right)^3=2^3\\ \Rightarrow x-1=2\\ \Rightarrow x=2+1\\ \Rightarrow x=3\)
Vậy, `x = 3`
b)
\(3^{2x+1}+9^x=324?\\ \Rightarrow3^{2x}\cdot3+3^{2x}=324\\ \Rightarrow3^{2x}\cdot\left(3+1\right)=324\\ \Rightarrow3^{2x}\cdot4=324\\ \Rightarrow3^{2x}=81\\ \Rightarrow3^{2x}=3^4\\ \Rightarrow2x=4\\ \Rightarrow x=2\)
Vậy, `x = 2`
c)
\(5^x-13=3\cdot2^2\\ \Rightarrow5^x-13=12\\ \Rightarrow5^x=12+13\\ \Rightarrow5^x=25\\ \Rightarrow5^x=5^2\\ \Rightarrow x=2\)
Vậy, `x = 2`
d)
\(8^x+2^{3x+1}=192\\ \Rightarrow2^{3x}+2^{3x}\cdot2=192\\ \Rightarrow2^{3x}\left(1+2\right)=192\\ \Rightarrow2^{3x}\cdot3=192\\ \Rightarrow2^{3x}=64\\ \Rightarrow2^{3x}=2^6\\ \Rightarrow3x=6\\ \Rightarrow x=2\)
Vậy, `x = 2.`
3.22 nha :)))
a) 232 - (581 + 132 - 331)
= 232 - 581 - 132 + 331
= (232 - 132) - (581 - 331)
= 100 - 250
= - (250 – 100)
= - 150
b) [12 + (-57)] - [- 57 - (-12)]
= (12 – 57) – (- 57 + 12)
= 12 - 57 + 57 - 12
= (12 – 12) + (57 – 57)
= 0 + 0
= 0
a) 232 - (581 + 132 - 331)
= 232 - 581 - 132 + 331
= (232 - 132) - (581 - 331)
= 100 - 250
= - (250 – 100)
= - 150
b) [12 + (-57)] - [- 57 - (-12)]
= (12 – 57) – (- 57 + 12)
= 12 - 57 + 57 - 12
= (12 – 12) + (57 – 57)
= 0 + 0
= 0
Tham khảo :
a) 232 - (581 + 132 - 331)
= 232 - 581 - 132 + 331
= (232 - 132) - (581 - 331)
= 100 - 250 = -150
b) [12 + (-57)] - [-57 - (-12)]
= 12 - 57 + 57 - 12
= (12 - 12) + (57 - 57)
= 0