1+6+7+9+3+5+67+78+23 +87+98+34+34=bao nhiêu
a.34+x=51
b.58-x=19
c.32-x=19
d.x-9=81
Tìm x:
a) 28 – x = 16
34 – x = 9
34 – x = 15
b) x – 14 = 18
x + 20 = 36
17 – x = 8
Bài 1 : Tính
8 x 8 =
6 x 4 =
4 x 4
Bài 2 : < , > , =
4 x 6 7 x 5
5 x 7 8 x 9
3 x 5 6 x 9
1 x 2 = ?
1 x 2 x 3 = ?
1 x 2 x 3 x 4 = ?
1 x 2 x 3 x 4 x 5 = ?
1 x 2 x 3 x 4 x 5 x 6 = ?
1 x 2 x 3 x 4 x 5 x 6 x 7 = ?
1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 = ?
1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 = ?
1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 x 10 = ?
1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 =
1+1 = ?
2 + 2 = ?
3 + 3 =?
4 + 4 = ?
5 + 5 = ?
7 x 7 = ?
8 x 8 = ?
9 x 9 = ?
6 x 6 = ?
9 x 1 =
9 x 2 =
9 x 3 =
9 x 4 =
9 x 5 =
9 x 6 =
9 x 7 =
9 x 8 =
9 x 9 =
9 x 10 =
9 x 11 =
9 x 12 =
8 x 1 =
8 x 2 =
8 x 3 =
8 x 4 =
8 x 5 =
8 x 6 =
8 x 7 =
8 x 8 =
8 x 9 =
8 x 10 =