Tính nhẩm:
a) 3000 + 5000 = ..........
5000 + 5000 = ..........
4000 + 4000 = ..........
7000 + 2000 = ..........
6000 + 1000 = ..........
2000 + 8000 = ..........
b) 2000 + 700 = ..........
100 + 1000 = ..........
6000 + 600 = ..........
8000 + 500 = ..........
5000 + 300 = ..........
400 + 6000 = ..........
Tính nhẩm:
5000 + 100 = ..................
7400 - 400 = ..................
2000 3 + 600 = ..................
8000 : 2 + 2000 = ..................
6000 - (5000 - 1000) = ..................
6000 - 5000 + 1000 = ..................
7000 - 3000 x 2 = ..................
(7000 - 3000) x 2 = ..................
x + 1000 = 5000 + 5000
1000 + 1000 + 1000 + 1000 +1000 = 5000
tk
ok
1000 + 1000 + 1000 + 1000 + X = 5000
tìm X
1000+1000+5000
Tính nhanh :
1000 + 2000 + 3000 + 4000 + 5000 + 6000 + 7000 + 8000 + 9000 + 5000
\(1000+5000=?\) \(3000-1000=?\)
\(3000+5000=?\) \(10000-5000=?\)
\(1000+9000=?\) \(5000-5000=?\)
\(2000+5000=?\) \(8000-5000=?\)
Tính nhẩm: 5000 + 1000 =