400 + 400 + 400 - 500
= 400 x 3 - 500
= 1200 - 500
= 7000
400 + 400 + 400 - 500
= 800 + 400 - 500
= 1200 - 500
= 700
400+400+400-500
=400x3-500
=1200-500
=700
k mk nhé
xin bn đó
400 + 400 + 400 - 500
= 400 x 3 - 500
=1200 - 500
=700
400 + 400 + 400 - 500
= 400 x 3 - 500
= 1200 - 500
= 7000
400 + 400 + 400 - 500
= 800 + 400 - 500
= 1200 - 500
= 700
400+400+400-500
=400x3-500
=1200-500
=700
k mk nhé
xin bn đó
400 + 400 + 400 - 500
= 400 x 3 - 500
=1200 - 500
=700
Tính nhẩm:
5200 + 400 =
6300 + 500 =
8600 + 200 =
5600 – 400 =
6800 – 500 =
8800 – 200 =
100+100+200+200+300+300+400+400+500+500+600+600+700+700+800+800+900+900+?
500 + x = 100 + 500
300 - x = 300 + 200
400 - x = 200 + 400
1. Tính nhẩm :
a) 5200 + 400 = 6300 + 500 = 8600 + 200 =
5600 - 400 = 6800 - 500 = 8800 - 200 =
b) 4000 + 3000 = 6000 + 4000 = 9000 + 1000 =
7000 - 4000 = 10000 - 6000 = 10000 - 9000 =
7000 - 3000 = 10000 - 4000 = 10000 - 1000 =
Tính nhẩm:
a) 500 + 400 = .......
900 – 400 = .......
900 – 500 = .......
b) 700 + 50 = .......
750 – 50 = .......
750 – 700 = .......
c) 300 + 40 + 6 = .......
300 + 40 = .......
300 + 6 = ......
Tính nhẩm:
a, 500 + 400
b, 900 – 400
c, 700 + 50 + 6
d, 750 - 700
Tính nhẩm:
a) 400 + 300 =
700 – 300 =
700 – 400 =
b) 500 + 40 =
540 – 40 =
540 – 500 =
c) 100 + 20 + 4 =
300 + 60 + 7 =
800 + 10 + 5 =
x+ 400 = 500 + 500
1000:500*200+300*400+500