1+1=
2-1=
3-2=
4-0=
12+12-12=
lưu ý : ai k mk mk k lại , ok .
Tính nhẩm :
2 × 3 = ... 4 × 8 = ...
12 : 2 = ... 27 : 3 = ...
4 × 7 = ... 5 × 6 = ...
36 : 4 = ... 18 : 2 = ...
3 × 1 = ... 4 × 3 = ...
0 : 5 = ... 3 × 4 = ...
1 × 8 = ... 12 : 4 = ...
0 : 3 = ... 12 : 3 = ...
Tính
a)
2 × 3 × 1 = .......... = .........
2 × 1 × 3 = ......... = ..........
b)
4 × 5 : 1 = ........... = ..........
4 : 1 × 5 = ........... = ..........
c)
8 : 4 × 1 = ........... = ..........
8 × 1 : 4 = ........... = ..........
d)
12 : 3 : 1 = .......... = ..........
12 : 1 : 3 = .......... = ...........
1+2+4:12+8-1+1=
1 + 9 =
2 + 12 =
9 + 56 =
12 + 4893 =
hãy tính nhanh:
A.1+2+3+4+5+6+7+8+9+10+11+12+13-14=?
B.30-29+28-27+26-25+24-23+22-21...+12-11+10-9+8-7+6-5+4-3+2-1=?
12 X 2 = ?
12 | 24 |
89 | 74 |
1+1=6
2+2=12
3+3=16
4+4=?
12 - 3 = ? + 91 = ? + 10 + 1 = ?
123 - 2 + 111 =
=
12 ? 3 = 4 x 4 = ? + 45 = ?
12 - 3 = ?