x + 12 = 34 + 12
tính nhanh
7/12+5/12+2/17
109/17×213/217+3/112+221/217
12/17×21/25×34/12×25/42
25/34×3/13×34/50×26/2
57/20×13/17-17/20×13/17
2006/2007×2/7+1/2007×2/7
khó qua !!!!
Tìm x
X × 12 = 150 × 2 3 4 ÷ x = 1 2
Tính: (1+ 2+ 3 +..... + 100) × (234 × 12 + 743 × 34) ×(960 – 80 × 12)
Tính: (1+ 2+ 3 +..... + 100) × (234 × 12 + 743 × 34) ×(960 – 80 × 12)
Tìm x
3 4 : X = 1 2
(X - 12) x 17 = 34
Tìm y, biết:
a) 34,8 : y = 7,2 + 2,8 b) 21,22 + 9,072 + 24,72 : 12 = y : 2
If 144/17 x 34/12 < n < 169/34 : 13/68 and n is a natural number then n = ..........