1+1+1+1+1+1+1=?
2+2+2+2+2+2+2=?
3+3+3+3+3+3+3=?
4+4+4+4+4+4+4=?
5+5+5+5+5+5=?
Viết số thích hợp vào chỗ chấm:
1×3=… 3×1=… 0×2=… 2×0=…
5×1=… 1×5=… 4×0=… 0×4=…
2×1=… 1×2=… 3×0=… 0×3=…
1×4=… 4×1=… 0×5=… 5×0=…
Tính nhẩm :
1 × 2 = .... 1 × 3 = ....
2 × 1 = .... 3 × 1 = ....
2 : 1 = .... 3 : 1 = ....
1 × 4 = .... 1 × 5 = .....
4 × 1 = .... 5 × 1 = ....
4 : 1 = ..... 5 : 1 = .....
1 × 1 = ..... 1 : 1 = .....
1/1=1
2/2=2
3/3=3
4/4=4
5/5=5
1=?
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+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 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 = ?
Tính nhẩm:
4 × 3 = ... | 32 : 4 = ... | 0 × 5 : 4 = ... |
5 × 9 = ... | 18 : 3 = ... | 1 × 2 : 2 = ... |
3 × 7 = ... | 20 : 2 = ... | 0 : 4 : 3 = ... |
2 × 8 = ... | 35 : 5 = ... | 3 : 3 × 4 = ... |