72 : x – 3 = 5
(72 : x) – 3 = 5
72 : x = 5 + 3
72 : x = 8
x = 72 : 8
x = 9
72 : x – 3 = 5
(72 : x) – 3 = 5
72 : x = 5 + 3
72 : x = 8
x = 72 : 8
x = 9
Tìm x biết:
a, (x + 72) × 4 = 320
b, (x - 56) × 7 = 749
c, (x + 3) × 4 = 36
d, (x - 5) × 6 = 72
x+x.5= 72 . hãy tìm x
Tìm x
a) X + 15 = 20 b) X – 18 = 16 c) 72 – x = 50
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d) X x 7 = 42 e) X : 7 = 5 f) 49 : x = 7
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Tìm x biết: x × 8 + 72 = 72?
A. x = 0
B. x = 1
C. x = 2
D. x = 3
tìm X
A. 72 : X = 2 x 4 B.X x 8 = 24 x 3 C.55 : X = 20 :4
Tính nhẩm:
7 x 8 = ..... 16 : 2 = ..... 36 : 6 = ..... 49 : 7 = .....
2 x 5 = ..... 72 : 8 = ..... 9 x 3 = ...... 63 : 7 = .....
6 x 4 = ..... 25 : 5 = ..... 4 x 8 = ...... 7 x 5 = ......
Tìm x:
X x 9 = 72
Tìm x:
8 x x = 72
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Tính nhẩm
9 x 6 = ...... 9 x 7 = ...... 9 x 5 = ...... 9 x 8 = ......
54 : 9 = ..... 63 : 9 = ..... 45 : 9 = ..... 72 : 9 = .....
54 : 6 = ..... 63 : 7 = ..... 45 : 5 = ..... 72 : 8 = .....