X+100+100+200+500=3000-2000
3000 : 10 x 500 = ?
2000 : 100 x 600= ?
3000 : 10 x 500 = 300 x 500 = 150000
2000 : 100 x 600 = 20 x 600 = 12000
500 + 500 = ?
100 + 100 = ?
200 + 200 = ?
2000 x 20 = ?
500 + 500 = 1 000
100 + 100 = 200
200 + 200 = 400
2 000 x 20 = 40 000
500 + 500 = 1000
100 + 100 = 200
200 + 200 = 400
2000 x 20 = 40000
500+500=1000
100+100=200
200+200=400
2000x20=4000
k mình nha
2000-x-100+200=500
2000-x-100=300
2000-x=400
x=2000-400
x=1600
ta có: 2000-x-100+200=500
=>2000-x-100 =300
=>2000-x = 400
=>x =1600
vậy: x=1600
ai tk mk rồi mk tk lại hứa luôn.
=>2000-x-100=500-200
=>2000-x-100=300
=>x-100=300+100
=>2000-x=400
=>x=2000-400
x=1600
Vậy x=1600
1000 - 200 + 3000 - 20000 + 30000 -100 + 2000 =
1000 - 200 + 3000 - 20000 + 30000 -100 + 2000 =15700
1000-200 +3000 -20000 +30000 -100 +2000 =15700 nha
20 + 80 + 100 - 200 + 1000 + 2000 - 3000 +1 = ???
20 + 80 + 100 - 200 + 1000 + 2000 - 3000 + 1
= (100 + 100 - 200) + 1000 + 200 - 3000 + 1
= 0 + ( 1000 + 2000 - 3000 ) + 1
= 0 + 0 +
= 1
tk mk nha
yêu mọi người nhiều ạ !!!!!!!!
20 + 80 + 100 - 200 + 1000 + 2000 - 3000 + 1
= {( 20 + 80 ) + 100 - 200 } + { ( 1000 + 2000 ) - 3000 } + 1
= (100 - 100 ) + ( 3000 - 3000 ) + 1
= 0 + 0 + 1
= 1
tích cho tôi nhé
tớ rất cảm ơn câu
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
Tính nhẩm theo mẫu
Mẫu: 5700 – 200 = 5500
8400 – 3000 = 5400
3600 – 600 =
6200 – 4000 =
7800 – 500 =
4100 – 1000 =
9500 – 100 =
5800 – 5000 =
3600 – 600 = 3000
6200 – 4000 = 2200
7800 – 500 = 7300
4100 – 1000 = 3100
9500 – 100 = 9400
5800 – 5000 = 800
Bài 1:Tính nhẩm:
BCNN ( 40 ; 60 ) ; BCNN ( 300 ; 700 ; 500 )
BCNN ( 2000 ; 400 ; 3000 ) ; BCNN ( 25 ; 125 ; 100 )
Tính nhẩm
5000 + 2000 + 1000 1800 + 1200 + 6000
4000 + 3000 + 3000 4900 + 500 + 100
`5000 + 2000 + 1000=8000 `
`1800 + 1200 + 6000=9000`
`4000 + 3000 + 3000=10000 `
`4900 + 500 + 100=5500`
5 000 + 2 000 + 1 000 = 8 000
4 000 + 3 000 + 3 000 = 10 000
1 800 + 1 200 + 6 000 = 9 000
4 900 + 500 + 100 = 5 500