67+9+1+9+1+9+3+1+4+7+7+7+7+8+9+3+6+2=dung minh tk
7/9 +9/7 + 6/9 + 11/7 = ?
... 7 ... ....+7 ... ... 9=... 7 7 9 7
Tính nhanh:
7/9 x 20/9 - 7/9 x 2/9
tính nhanh 7 x 4/9 + 6/ 9 x 5/7 - 5/7 x 1/9 b.1/1 x 3 + 1/3 x 5 + 1/5 x 7 + 1/ 7 x 9 ( mong mn giúp nhó !!!)
1+1+2+3+4+5+5+6+7+8+9+9+9+7+5+5+6+9+9+9+9
10/7 + 4/7 + 4/9+7/9=?
câu 7: điền dấu >;<;= a) 6/11 ... 8/11 b) 8/5 ... 8/7 c) 7/9 ... 9/7 d) 9/15 ... 6/10
\(\dfrac{9}{8}...\dfrac{3}{9};\dfrac{7}{9}...\dfrac{7}{9}\)
so sánh