a) 56 x 147- 56 x 47 = 56 x(147- 47) + 134
=56 x 100 +134
=5734
\(56.147-56.47+134=56.\left(147-47\right)+134=56.100+134=5600+134=5734\)
a) 56 x 147- 56 x 47 +134
= 56 x ( 147 - 47 ) +134
= 56 x 100 + 134
=5600 + 134
=5734
a) 56 x 147- 56 x 47 = 56 x(147- 47) + 134
=56 x 100 +134
=5734
\(56.147-56.47+134=56.\left(147-47\right)+134=56.100+134=5600+134=5734\)
a) 56 x 147- 56 x 47 +134
= 56 x ( 147 - 47 ) +134
= 56 x 100 + 134
=5600 + 134
=5734
Tìm x biết
a) − 4 3 x + 3 2 = 5 6
b) 0,75x − 1 5 + 4 7 = 1 4 7
Tìm số tự nhiên x biết:
a) 5 6 + 1 6 ≤ x ≤ 13 4 + 14 8
b) − 5 6 + 8 3 + 29 − 6 ≤ x ≤ − 1 2 + 2 + 5 2
Tính nhanh:
a) -56-(47-56)+33
b) 168+(35-68)-35
Tìm x ∈ ℕ , biết:
a ) 5 6 + 1 6 ≤ x ≤ 13 4 + 14 8 b ) − 5 6 + 8 3 + 29 − 6 ≤ x ≤ − 1 2 + 2 + 5 2 c ) 79 15 + 7 5 + − 8 3 ≤ x ≤ 10 3 + 15 4 + 23 12
Tìm x thuộc N, biết:
a ) 5 6 + 1 6 ≤ x ≤ 13 4 + 14 8 b ) − 5 6 + 8 3 + 29 − 6 ≤ x ≤ − 1 2 + 2 + 5 2 c ) 79 15 + 7 5 + − 8 3 ≤ x ≤ 10 3 + 15 4 + 23 12
Tìm x thuộc Z, biết:
a) 5 6 + 1 6 ≤ x ≤ 13 4 + 14 8
b) − 5 6 + 8 3 + 29 − 6 ≤ x ≤ − 1 2 + 2 + 5 2
c) 79 15 + 7 5 + − 8 3 ≤ x ≤ 10 3 + 15 4 + 23 12
Tính nhanh
a/-3x15+(-3)3 x 6+95
b/(56-117)-(83-244)
c/45x(13-47)+47x(45-13)
Tính nhanh: 56+ (47 + 44).
bài1: tính nhanh
a, 89 + ( -36 ) + ( -8 ) + 29 + 15 + ( -34 )
b, -195 . 56 -43 . 195 - 195
c, 135 . ( -12 + 147 ) - 147 . ( 135 - 12 )
bài 2 : tìm x
a, 3-(17-x) = -12
b, -26-(x-7)= 0
c, /x+3/-7=13
d, /x-7/+15=23
e, (x+2)(x+3)=0
g, (x-1)( x^2+1)=0