Tính nhẩm:
a) 3500 + 200 = ..............
3700 - 200 = ..............
7100 + 800 =..............
7900 - 8000 = ..............
4400 + 300 = ..............
4700 - 3000 = ..............
b) 6000 + 2000 = ..............
8000 - 6000 = ..............
8000 - 2000 = ..............
7000 + 3000 = ..............
10 000 - 7000 = ..............
10 000 - 3000 = ..............
2000 + 8000 = ..............
10 000 - 2000 = ..............
10 000 - 8000 = ..............
a) 3500 + 200 = 3700
3700 - 200 = 3500
7100 + 800 = 7900
7900 - 8000 = 7100
4400 + 300 = 4700
4700 - 3000 = 4400
b) 6000 + 2000 = 8000
8000 - 6000 = 2000
8000 - 2000 = 6000
7000 + 3000 = 10 000
10 000 - 7000 = 3000
10 000 - 3000 = 7000
2000 + 8000 = 10 000
10 000 - 2000 = 8000
10 000 - 8000 = 2000
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 = ..................
5000 + 100 = 5100
7400 - 400 = 7000
2000 3 + 600 = 6600
8000 : 2 + 2000 = 6000
6000 - (5000 - 1000) = 2000
6000 - 5000 + 1000 = 2000
7000 - 3000 x 2 = 1000
(7000 - 3000) x 2 = 8000
5000 + 100 = 5100
7400 - 400 = 7000
2000 3 + 600 = 6600
8000 : 2 + 2000 = 6000
6000 - (5000 - 1000) = 2000
6000 - 5000 + 1000 = 2000
7000 - 3000 x 2 = 1000
(7000 - 3000) x 2 = 8000
5000 + 100 = 5100
7400 - 400 = 7000
2000 3 + 600 = 6600
8000 : 2 + 2000 = 6000
6000 - (5000 - 1000) = 2000
6000 - 5000 + 1000 = 2000
7000 - 3000 x 2 = 1000
(7000 - 3000) x 2 = 8000
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 = ..........
a) 3000 + 5000 = 8000
5000 + 5000 = 10 000
4000 + 4000 = 8000
7000 + 2000 = 9000
6000 + 1000 = 7000
2000 + 8000 = 10 000
b) 2000 + 700 = 2700
100 + 1000 = 1100
6000 + 600 = 6600
8000 + 500 = 8500
5000 + 300 = 5300
400 + 6000 = 6400
a) 3000+5000=8000
5000+5000=10000
4000+4000=8000
7000+2000=9000
6000+1000=7000
2000+8000=10000
b) 2000+700=2700
100+1000=1100
6000+600=6600
8000+500=8500
5000+300=5300
400+6000=6400
a) 3000 + 5000 = 8000
5000 + 5000 = 10000
4000 + 4000 =8000
7000 + 2000 = 9000
6000 + 1000 = 7000
2000 + 8000 = 10000
b) 2000 + 700 = 9000
100 + 1000 = 1100
6000 + 600 =12000
8000 + 500 = 13000
5000 + 300 = 5300
400 + 6000 = 6400
Viết các tổng thành số có bốn chữ số (theo mẫu):
a) Mẫu: 5000 + 200 + 70 + 8 = 5278
7000 + 600 + 50 + 4 = ................
2000 + 800 + 90 + 6 = ................
8000 + 400 + 20 + 7 = ................
9000 + 900 + 90 + 9 = ................
b) Mẫu: 4000 + 20 + 1 = ................
3000 + 60 + 8 = ................
7000 + 200 + 5 = ................
9000 + 50 + 6 = ................
2000 + 100 + 3 = ................
5000 + 7 = ........................
9000 + 9 = ........................
3000 + 300 + 3 = ................
8000 + 700 + 5 = ................
a) Mẫu: 5000 + 200 + 70 + 8 = 5278
7000 + 600 + 50 + 4 = 7654
2000 + 800 + 90 + 6 = 2896
8000 + 400 + 20 + 7 = 8427
9000 + 900 + 90 + 9 = 9999
b) Mẫu: 4000 + 20 + 1 = 4021
3000 + 60 + 8 = 3068
7000 + 200 + 5 = 7205
9000 + 50 + 6 = 9056
2000 + 100 + 3 = 2103
5000 + 7 = 5007
9000 + 9 = 9009
3000 + 300 + 3 = 3303
8000 + 700 + 5 = 8705
a) Mẫu: 5000 + 200 + 70 + 8 = 5278
7000 + 600 + 50 + 4 = 7654
2000 + 800 + 90 + 6 = 2896
8000 + 400 + 20 + 7 = 8427
9000 + 900 + 90 + 9 = 9999
b) Mẫu: 4000 + 20 + 1 = 4021
3000 + 60 + 8 = 3068
7000 + 200 + 5 = 7205
9000 + 50 + 6 = 9056
2000 + 100 + 3 = 2103
5000 + 7 = 5007
9000 + 9 = 9009
3000 + 300 + 3 = 3303
8000 + 700 + 5 = 8705
Tính:
6000 + 3000 + 1000 = …………
56 000 : 7 = …………
5000 x 3 = …………
9000 – 7000 – 2000 = …………
Hướng dẫn giải:
6000 + 3000 + 1000 = 10 000
56 000 : 7 = 8000
5000 x 3 = 15 000
9000 – 7000 – 2000 = 0
Viết các tổng theo mẫu:
4000 + 500 + 60 + 7
8000 + 100 + 50 + 9
3000 + 600 + 10 + 2
5000 + 500 + 50 + 5
7000 + 900 + 90 + 9
Mẫu: 4000 + 500 + 60 + 7 = 4567
8000 + 100 + 50 + 9 = 8159
3000 + 600 + 10 + 2 = 3612
5000 + 500 + 50 + 5 = 5555
7000 + 900 + 90 + 9 = 7999
Tính nhanh :
1000 + 2000 + 3000 + 4000 + 5000 + 6000 + 7000 + 8000 + 9000 + 5000
1000 +9000 +2000+8000+3000+7000+4000+6000+5000+5000
= 10000+10000+10000+10000+10000
=50000
k nhá !
Tính nhẩm:
| 20 x 4 = ....... | 200 x 3 = ....... | 2000 x 2 = ....... |
| 30 x 4 = ....... | 300 x 3 = ....... | 3000 x 2 = ....... |
| 40 x 4 = ....... | 400 x 3 = ....... | 4000 x 2 = ....... |
| 20 x 4 = 80 | 200 x 3 = 600 | 2000 x 2 = 4000 |
| 30 x 4 = 120 | 300 x 3 = 900 | 3000 x 2 = 6000 |
| 40 x 4 = 160 | 400 x 3 = 1200 | 4000 x 2 = 8000 |
1/2 + 1/2 =....?
1000 + 2000 + 3000 + 4000 + 5000 + 6000 + 7000 + 8000 + 9000 +10000 +....?
ai nhanh nhat minh tich
Merry Christmas tat ca moi nguoi
=0,5+0,5=1
1000+2000+3000+4000+5000+6000+7000+8000+9000+10000=55000
