1 + 2 + 3 = 6
7 + 8 + 2 =11
5 + 1 + 4 = 10
3 + 4 + 6 = 13
( Chúc Các Em Học Giỏi )
1 + 2 + 3 = 6
7 + 8 + 2 =11
5 + 1 + 4 = 10
3 + 4 + 6 = 13
( Chúc Các Em Học Giỏi )
1+1+1+1+1+1+1+1+1+1+2+3+4+5+67+8+9+10+11
tinh nham : 3+4+9+32-67+78+9+2+65+6+9+1+5+3=......................................?
1+2+3+4+5+6+7+8+9-1-2-3-4-5-6-7-8-9*2+1+2+3+4+5+6+7+8+9=
1+2+3+4+5+6+7+8+9+1+2+3+4+5+6+7+8+9+1+2+3+4+5+6+7+8+9
Tính nhanh:
a)2+4+8+6+7+8+3+9+2+1;
b)3+2+4+9+7+1+8+6+3+5;
c)2+3+4+5+6+7+8+9+1+4.
Tính nhẩm:
a. 1+1+2+2+3+3+4+4+5+5+6+6+7+7+8+8+9+9= ....?
b. 9-9+8-8+7-6+6-5+1-3+2+4+5+6-3-8=....?
Tính nhẩm
9 + 1 + 8 = ….
5 + 5 + 4 = ….
8 + 2 + 2 = ….
9 + 1 + 6 = ….
7 + 3 + 2 = ….
6 + 4 + 1 = ….
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+2+3+4+5+6+7+8+9+0+1+1+2+3+4+5+6+7+8+890+