a) 5 : 5 × 4 = 1 × 4 = 4
b) 3 × 1 : 3 = 3 : 3 = 1
c) 27 : 3 + 28 = 9 + 28 = 37
d) 24 : 3 – 5 = 8 – 5 = 3
a) 5 : 5 × 4 = 1 × 4 = 4
b) 3 × 1 : 3 = 3 : 3 = 1
c) 27 : 3 + 28 = 9 + 28 = 37
d) 24 : 3 – 5 = 8 – 5 = 3
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=?
28+27+26+25+24+23+22+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1+=....................................................?
2 × 8 = ... | 16 : 2 = ... |
21 : 3 = ... | 4 × 5 = ... |
3 × 8 = ... | 24 : 3 = ... |
5 × 6 = ... | 5 × 4 = ... |
4 × 8 = ... | 40 : 4 = ... |
28 : 4 = ... | 20 : 4 = ... |
5 × 8 = ... | 40 : 5 = |
Tính nhẩm:
2 × 8 = ... | 16 : 2 = ... |
21 : 3 = ... | 4 × 5 = ... |
3 × 8 = ... | 24 : 3 = ... |
5 × 6 = ... | 5 × 4 = ... |
4 × 8 = ... | 40 : 4 = ... |
28 : 4 = ... | 20 : 4 = ... |
5 × 8 = ... | 40 : 5 = ... |
3 × 6 = ... | 20 : 5 = ... |
Tính nhẩm
a) 4 × 7 = …
b) 5 × 9 = …
c) 36 : 4 =…
d) 27 : 3 =…
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29=bn
ai nhanh mk tick cho,nhớ kb với mk nha
Tính:
5 × 7 + 27 = … 5 × 9 – 18 = …
24 : 3 × 5 = … 6 : 3 × 5 = …
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 = .......... = ...........
Tính:
a) 2 × 9 + 63=…
b) 24 : 4 + 44 =…
c) 5 × 6 − 12 =…
d) 3 × 7 −16=…