8000+2000=.....?
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
4000 – (2000 – 1000) =
4000 – 2000 + 1000 =
8000 – 4000 x 2 =
(8000 – 4000) x 2 =
Học sinh nhẩm và ghi kết quả như sau :
4000 – ( 2000 – 1000 ) = 3000
4000 – 2000 + 1000 = 3000
8000 – 4000 x 2 = 0
(8000 – 4000) x 2 = 8000
trả lời:
4000 -(2000 - 1000)
= 3000
4000 -2000 + 1000
= 3000
8000 - 4000 x 2
=0
( 8000 - 4000 ) x2
= 8000
4000 – (2000 – 1000) =3000
4000 – 2000 + 1000 =3000
8000 – 4000 x 2 =0
(8000 – 4000) 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
a) 9000 - 7000 = ...............
3000 - 2000 = ...............
8000 -8000 = ...............
5000 - 1000 = ...............
6000 - 5000 = ...............
10000 - 2000 = ...............
b) 4600 - 400 = ...............
8500 - 500 = ...............
9900 - 300 = ...............
6800 - 700 = ...............
7200 - 3000 = ...............
5600 - 2000 = ...............
3800 - 3000 = ...............
7400 - 400 = ...............
a) 9000 - 7000 = 2000
3000 - 2000 = 1000
8000 -8000 = 0
5000 - 1000 = 4000
6000 - 5000 = 1000
10000 - 2000 = 8000
b) 4600 - 400 = 4200
8500 - 500 = 8000
9900 - 300 = 9600
6800 - 700 = 6100
7200 - 3000 = 4200
5600 - 2000 = 3600
3800 - 3000 = 800
7400 - 400 = 7000
a)9000-7000=2000
3000-2000=1000
8000-8000=0
5000-1000=4000
6000-5000=1000
10000-2000=8000
b)4600-400=4200
8500-500=8000
9900-300=9600
6800-700=6100
7200-3000=4200
5600-2000=3600
3800-3000=800
7400-400=7000
a) 9000 - 7000 = 2000
3000 - 2000 = 1000
8000 -8000 = 0
5000 - 1000 = 4000
6000 - 5000 = 1000
10000 - 2000 = 8000
b) 4600 - 400 = 4200
8500 - 500 = 8000
9900 - 300 = 9600
6800 - 700 = 6100
7200 - 3000 = 4200
5600 - 2000 = 3600
3800 - 3000 = 800
7400 - 400 = 7000
Tính nhẩm:
7000 + 2000
16000 : 2
9000 - 3000
8000 x 3
8000 : 2
11000 x 3
3000 x 2
49000 : 7
7000 + 2000 = 9000
16000 : 2 = 8000
9000 - 3000 = 6000
8000 x 3 = 24 000
8000 : 2 = 4000
11000 x 3 = 33 000
3000 x 2 = 6000
49000 : 7 = 7000
Tính nhẩm:
7000 + 2000
16000 : 2
9000 - 3000
8000 x 3
8000 : 2
11000 x 3
3000 x 2
49000 : 7
7000 + 2000 = 9000
16000 : 2 = 8000
9000 - 3000 = 6000
8000 x 3 = 24 000
8000 : 2 = 4000
11000 x 3 = 33 000
3000 x 2 = 6000
49000 : 7 = 7000
Tính nhẩm: 8000 + 2000 =
8000+2000=?
Số cần tìm là:
8000+2000=10000
Đáp số: 10000
7000+2000-8000=?
7000+2000-8000
= (7000+2000)-8000
=9000-8000
=1000
\(7000+2000-8000\)
\(=9000-8000\)
\(=1000\)
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