2[X-51]=2,23+20
1. 4 3/5 ... 4,35
2. 2 1/25 ... 2,2
3. 14,09 ... 14 1/10
4. 7 3/20 ... 7,15
điền lớn, bé, bằng
1. 4 3/5 > 4,35
2. 2 1/25 < 2,2
3. 14,09 < 14 1/10
4. 7 3/20 = 7,15
Tìm x:
a, 4.( x + 41 ) = 7
b, x. ( x-51 ) 2. 2 mũ 3 + 20
a) 4(x+41)=7
x+41=7/4
x=7/4-41
x=157/4
b) có gì đó sai sai-.-
2. (x - 51) = 2.8 + 20
2 . ( x - 51 ) = 2 . 8 + 20
2 . ( x - 51 ) = 16 + 20
2 . ( x - 51 ) = 36
x - 51 = 36 : 2
x - 51 = 18
x = 18 + 51
x = 69
2 . ( x-51)= 2.8 + 20
2.( x-51) = 16+20
2(x-51)=36
=> x-51=18
=> x= 69
2.(x-51)-22=20
\(2\left(x-51\right)-22=20.\)
\(2\left(x-51\right)=20+22.\)
\(2\left(x-51\right)=42.\)
\(x-51=42:2.\)
\(x-51=21.\)
\(x=21+51.\)
\(x=72.\)
Vậy.....
~ Học tốt!!! ~
\(2(x-51)-22=20\)
\(2x-102=20+22\)
\(2x-102=42\)
\(2x=144\)
\(x=72\)
tìm x
2(x- 51 )= 2. 22+20
tính bằng cách thuận tiện
3,54 x 73 + 2,23 x 25 + 3,54 + 1,77 x 25
2(x -51 ) = 2.2^3 + 20
\(2\left(x-51\right)=2.2^3+20\)
\(\Leftrightarrow2\left(x-51\right)=16+20\)
\(\Leftrightarrow2\left(x-51\right)=36\)
\(\Leftrightarrow x-51=13\)
\(\Leftrightarrow x=64\)
Vậy ..
cho mk hỏi xíu 2,2\(^3\) + 20 hay là 2\(\times\)2\(^3\)+20 vậy
2(x-51)=2.23+20
2(x-51)=24+20
x-51=36:2
x=18+51
x=69
Tính bằng cách thuật tiện nhất
a, 2,23 x 0,1 : 3,34 : 10 + 1/10 x 4,43
b, 4,5 : 100 + 5,4 x 0,01 + 1/100 x 0,1
a) \(2,23\cdot0,1+3,34:10+1:10\cdot4,43\)
\(=2,23\cdot0,1+3,34\cdot0,1+4,43\cdot0,1\)
\(=0,1\cdot\left(2,23+3,34+4,43\right)\)
\(=1\)
b) \(4,5:100+5,4\cdot0,01+1:100\cdot0,1\)
\(=4,5\cdot0,01+5,4\cdot0,01+0,1\cdot0,01\)
\(=0,01\left(4,5+5,4+0,1\right)\)
\(=0,1\)
tìm x : 2(x - 51)= 2.23 + 20
\(2(x-51)=2\cdot2^3+20\)
\(2(x-51)=2\cdot8+20\)
\(2(x-51)=16+20\)
\(2(x-51)=36\)
\(x-51=36:2\)
\(x-51=18\)
\(x=18+51\)
\(x=69\)
2 ( x - 51 ) = 2 . 23 + 20
2 ( x - 51 ) = 24 + 20
2 ( x - 51 ) = 16 + 20
2 ( x - 51 ) = 36
( x - 51 ) = 36 : 2
( x - 51 ) = 18
x = 18 + 51
x = 69
Vậy x = 69
Tk nhé!!!