- ( x + 46 ) + 132 = - 19
Câu 14 (1,0 điểm): Thực hiện phép tính: 6.2^2-36:3°2 ,b:19.48+52.19-400 a) Câu 15 (1,0 điểm). Tìm số nguyên x, biết: a) 3x-2=19 b) 19.48 +52.19-400 b) 132 +2.(x-4)=46
Câu 14:
a. $6.2^2-36:3^2=6.4-36:9=24-4=20$
b. $19.48+52.19-400=19(48+52)-400=19.100-400=1900-400=1500$
132-2(x-4)=46
132-2(x-4)=46
2(x-4)=132-46
2(x-4)=86
X-4=86:2
X-4=43
X=43+4
X=47
132 - 2 . ( x -4 ) = 46
132 - 2.(x - 4) = 46
2.(x - 4) = 132 - 46
2.(x - 4) = 86
x - 4 = 86 : 2
x - 4 = 43
x = 43 + 4
x = 47
\(132-2\left(x-4\right)=46\\\Rightarrow2\left(x-4\right)=86\\ \Rightarrow x-4=43\\ \Rightarrow x=47\)
Vậy x = 47
Đặt tính rồi tính.
24 132 x 4 63 854 : 7
7 148 x 2 46 519 : 6
[75 x 19] x30 :19 x28 -132=?
[75 x 19] x30 :19 x28 -132=?
= 1425 x 30 : 19 x 28 - 132
= 42750 : 19 x 28 - 132
= 2250 x 28 - 132
= 63000 - 132
= 62868
tinh nhanh
A 196 x 56 + 196 x 41 + 4 x 196 - 196 = ?
B 132 x 19 + 132 x 18 + 64 x 132 - 132 = ?
C 145 x 69 + 145 x 32 - 145 = ?
ai tich cho minh minh tich cho
A : 196 x 56 + 196 x 41 + 4 x 196 - 196 x 1
= 196 x ( 56 + 41 + 4 - 1 )
= 196 x 100
= 19 600
B : 132 x 19 + 132 x 18 + 64 x 132 - 132 x 1
= 132 x ( 19 + 18 + 64 - 1 )
= 132 x 100
= 13 200
C : 145 x 69 + 145 x 32 - 145 x 1
= 145 x ( 69 + 32 - 1 )
= 145 x 100
= 14 500
A = 196 x 56 + 196 x 41 + 4 x 196 - 196
A = 196 x ( 56 + 41 + 4 - 1 )
A = 196 x 100 = 19600
B = 132 x 19 + 132 x 18 + 64 x 132 - 132
B = 132 x ( 19 + 18 + 64 - 1 )
B = 132 x 100 = 13200
C = 145 x 69 + 145 x 32 - 145
C = 145 x ( 69 + 32 - 1 )
C = 145 x 100 = 14500
a ) = 196 x 56 + 196 x 41 + 4 x 196 - 196 x 1
= 196 x ( 56 + 41 + 4 - 1 )
= 196 x 100
= 19600
b ) = 132 x 19 + 132 x 18 + 64 x 132 - 132 x 1
= 132 x ( 19 + 18 + 64 - 1 )
= 132 x 100
= 13200
c ) = 145 x 69 + 145 x 32 - 145 x 1
= 145 x ( 69 + 32 - 1 )
= 145 x 100
= 14500
a.x - 8 : 4 - (46 - 23 .2 + 6 . 3) = 0
b. 240 - (23 + (13+24.3-x)) = 132
Thực hiện phép tính: (Tính nhanh nếu có thể)
1) 347.22 – 22 . ( 216 + 184 ) : 8 ;
2) 132 – [116 – ( 132 – 128 )2] ;
3) 16 :{400 : [200 – ( 37 + 46 . 3 )]} ;
4) {184 : [96 – 124 : 31 ] – 2 }. 3651 ;
5) 46 – [ (16 + 71 . 4 ) : 15 ]} – 2 ;
6) 33.18 + 72 .42 – 41 .18
7)( 56 . 46 – 25 . 23 ) : 23 ;
8) ( 28 . 54 + 56 . 36 ) : 21 : 2 ;
9) ( 76 . 34 – 19 . 64 ) : ( 38 . 9 ) ;
10) ( 2+ 4 + 6 + ….. + 100 ) . ( 36 . 333 – 108 . 111)
11) ( 5 . 411- 3 .165 ): 410
12) \(\dfrac{7256.4375-725}{3650+4375.7255}\)
BTVN
1. Tìm x thuộc Z, bt:
a, 15-x=20
b, (-27) +x=-19
c, x -(-39) = -2
d, (35-x)-19=-40
e) (-46)-(x-12)=59
g) (36+x)-(-46)=-20