Tìm x biết:
a/156-(x+61)=82
b/124+(18-x)=317
Bài 2: Tìm x:
a) 156 – (x+ 61) = 82 b) (x-35) -120 = 0 c) 124 + (118 – x) = 217 d) 7x – 8 = 713 e) x- 36:18 = 12 f) (x- 36):18 = 12 g) (x-47) -115 = 0 |
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Bài 3: Tính nhanh
a) 58.75 + 58.50 – 58.25 b) 27.39 + 27.63 – 2.27 c) 128.46 + 128.32 + 128.22 d) 66.25 + 5.66 + 66.14 + 33.66 e) 12.35 + 35.182 – 35.94 | f) 48.19 + 48.115 + 134.52 g) 27.121 – 87.27 + 73.34 h) 125.98 – 125.46 – 52.25 i) 136.23 + 136.17 – 40.36 j) 17.93 + 116.83 + 17.23 | k) 35.23 + 35.41 + 64.65 l) 29.87 – 29.23 + 64.71 m) 19.27 + 47.81 + 19.20
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Bài 4: Tính giá trị của biểu thức sau:
a) 2763 + 152 b) (-7) + (-14) c) (-35) + (-9) d) (-5) + (-248) e) (-23) + 105 f) 78 + (-123) g) 23 + (-13) h) (-23) + 13 i) 26 + (-6) | j) 80 + (-220) k) (-23) + (-13) l) (-26) + (-6) | m) 12 – 34 n) -23 – 47 o) 31 – (-23) p) -9 – (-5) q) 6 – (8 – 17) r) 19 + (23 – 33) s) (-12 – 44) + (-3) t) 4 – (-15) u) -29 – 23 | v) 99 – [109 + (-9)] w) (-75) + 50 x) (-75) + (-50) y) (-23) + 13 + ( - 17) + 57 z) 14 + 6 + (-9) + (-14)
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a: =>x+61=74
hay x=13
b: =>x-35=120
hay x=155
d: =>7x=721
hay x=103
Tìm số tự nhiên x biết: a/ (x-35)-120=0. ; b/124+(118-x)=217 ; c/ 156-(x+61)=82
a)(x-35)-120=0 b)124+(118-x)=217 c)156-(x+61)=82
x-35 = 0+120=120 118-x =217-124=93 x+61 = 156-82=74
x = 120+35=155 x = 118-93=25 x =74-61=13
suy ra x=155 suy ra x= 25 suy ra x=13
a) ( x - 35 ) - 120 = 0
<=> x - 35 = 120
<=> x = 155
b) 124 + ( 118 - x ) = 217
<=> 118 - x = 93
<=> x = 25
c) 156 - ( x + 61 ) = 82
<=> x + 61 = 74
<=> x = 13
Tìm số tự nhiên x , biết :
a) (x-35) -120=0
b) 124+(118-x)=217
c) 156-(x+61)=82
a, (x - 35) - 120 = 0
=> x - 35 = 120
=> x = 155
b, 124 + (118 - x) = 217
=> 118 - x = 93
=> x = 25
c, 156 - (x + 61) = 82
=> x + 61 = 74
=> x = 13
Tìm số tự nhiên x, biết:
a)(x - 35) - 120 = 0
b) 124 + (118 - x) = 217
c) 156 -(x + 61) = 82
a, ( x - 35 ) - 120 = 0
( x - 35 ) = 0 + 120
x - 35 = 120
x = 120 + 35
x = 155
Vậy x = 155
b, 124 + ( 118 - x ) = 217
( 118 - x ) = 217 - 124
118 - x = 93
x = 118 - 93
x = 25
Vậy x = 25
c, 156 - ( x + 61 ) = 82
( x + 61 ) = 156 - 82
x + 61 = 74
x = 74 - 61
x = 13
Vậy x = 13
a) \(\left(x-35\right)-120=0\)
\(\Rightarrow x-35=0+120\)
\(\Rightarrow x=120+35\)
\(\Rightarrow x=155\)
b) \(124+\left(118-x\right)=217\)
\(\Rightarrow118-x=217-124\)
\(\Rightarrow x=118-93\)
\(\Rightarrow x=25\)
c) \(156-\left(x+61\right)=82\)
\(\Rightarrow x+61=156-82\)
\(\Rightarrow x=74-61\)
\(\Rightarrow x=13\)
a) \(x=155\)
b) \(x=25\)
c) \(x=13\)
(Nhớ k cho mình với nhoa!)
Tìm số tự nhiên x, biết :
a. ( x - 35 ) - 120 = 0
b. 124 + ( 118 - x ) = 217
c. 156 - ( x + 61 ) = 82
a) ( x - 35 ) - 120 = 0
<=> x - 35 = 120
<=> x = 155
b) 124 + ( 118 - x ) = 217
<=> 118 - x = 93
<=> x = 25
c) 156 - ( x + 61 ) = 82
<=> x + 61 = 74
<=> x = 13
1.Tìm số tự nhiên x, biết :
a,(x-35)-120=0
b, 124+(118-x)=217
c, 156-(x+61)=82
Ta có: a, (x - 35) - 120 = 0
(x - 35) = 0 + 120
x - 35 = 120
x = 120 + 35
x = 155
b, 124 + ( 118 - x) = 217
(118 - x) = 217 - 124
118 - x = 93
x = 118 - 93
x = 25
c, 156 - ( x + 61) = 82
x + 61 = 156 - 82
x + 61 = 74
x = 74 - 61
x = 13
a,=>x-35=120
x=120+35
x=165
b,=>118-x=217-124
118-x=93
x=118-93
x=25
c,=>x+61=156-82
x+61=74
x=74-61
x=13
Tìm số tự nhiên x biết
A.[x-35]-120=0
B.156[x+61]=82
C.124+[118-x]=217
a) \(\left(x-35\right)-120=0\)
\(x-35=0+120\)
\(x-35=120\)
\(x=120+35\)
\(x=155\)
b) \(156.\left(x+61\right)=82\)
\(x+61=82:156\)
\(x+61=\frac{41}{78}\)
\(x=\frac{41}{78}-61\)
\(x=-\frac{4717}{78}\)
c) \(124+\left(118-x\right)=217\)
\(118-x=217-124\)
\(118-x=93\)
\(x=118-93\)
\(x=25\)
Tìm số tự nhiên x, biết:
a) (x - 35) - 120 = 0
b) 124 + (118 - x) = 217
c) 156 - (x + 61) = 82
a) (x - 35) = 0 + 120
(x - 35) =120
x =120 + 35
x =155
b) (118 - x) = 217 - 124
(118 - x) = 93
x = 118 - 93
x = 25
c) (x + 61) =156 - 82
(x + 61) = 70
x = 70 - 61 = 9
(x-35)-120=0
x-35=120
x=155
b, 124+(118-x)=217
118-x=93
x=25
c,156-(x+61)=82
x+61=74
x=13
a,(x-35)-120=0
(x-35) =0+120
x-35 =120
x =120+35
x =155
b,124+(118-x)=217
(118-x)=217-124
118-x = 93
x =118-93
x =25
c,156-(x+61)=82
(x+61)=156-82
(x+61)=74
x =74-61
x =13
Tìm số tự nhiên x, biết :
a/ ( x - 35 ) - 120 = 0
b/ 124 + ( 118 - x ) = 217
c/ 156 - ( x + 61 ) = 82
(x-35) - 120 = 0
=> x - 35 = 120
=> x = 155
124 + (118 - x) = 217
=> 118 - x = 217 - 124 = 93
=> x = 118 - 93 = 25
156 - (x+61) = 82
=> x + 61 = 156 - 82 = 74
=> x = 74 - 61 = 13
a, \(\left(x-35\right)-120=0\)
\(\Rightarrow x-35=120\)
\(\Rightarrow x=120+35\)
\(\Rightarrow x=155\)
b, \(124+\left(118-x\right)=217\)
\(\Rightarrow118-x=217-124\)
\(\Rightarrow118-x=93\)
\(\Rightarrow x=118-93\)
\(\Rightarrow x=25\)
c, \(156-\left(x+61\right)=82\)
\(\Rightarrow x+61=156-82\)
\(\Rightarrow x+61=74\)
\(\Rightarrow x=74-61\)
\(\Rightarrow x=13\)
a) ( x - 35 ) - 120 = 0
<=> x - 35 = 120
<=> x = 155
b) 124 + ( 118 - x ) = 217
<=> 118 - x = 93
<=> x = 25
c) 156 - ( x + 61 ) = 82
<=> x + 61 = 74
<=> x = 13