Tìm xx:
xx x 7 = 357
Tìm x
x x 7 = 70
Tìm x:
a) x x 4 = 36 b) 70 : x = 7
Tìm xx:
xx : 7 = 100 + 8
70 : 7 x 12 x 3 =
tìm x
xx + x + 52 = 100
Tìm x
xx - x × 2 = 378
a) 7 x 5 = ..... 7 x 6 = ..... 7 x 8 = ..... 7 x 4 = .....
35 : 7 = ..... 42 : 7 = ..... 56 : 7 = ..... 28 : 7 = .....
b) 42 : 7 = ..... 35 : 7 = ..... 63 : 7 = ..... 16 : 2 = .....
14 : 7 = ..... 49 : 7 = ..... 7 : 7 = ..... 48 : 6 = .....
28 : 7 = ..... 70 : = ..... 21 : 7 = ..... 56 : 7 = .....
Tìm x :
x + 120 = 70 x 2