2+2+2+2+2+2+2+2+2+2x10
\(A=\frac{3}{1^2x2^2}+\frac{5}{2^2x3^2}+\frac{7}{3^2x4^2}+............+\frac{19}{9^2x10^2}\)
2x1+9:2=2x10+2
đúng hay sai;đúng điền đ,sai điền s
2x1+9:2=2x10
Sai
Vì
2x1=2
9:2=4,5
=>2+4,5=6,5
2x10=20
=>20+2=22
2x10^3+7x10^2+8x10+7
d) 4x[(3+3^7:3^4):10+97]-300
e) 5x[(92+2^5:2):5^2+24]-7^2
f)3^2x[(5^2-3):11]-2^4+2x10^3-(1^48)^49
Câu hỏi :
2x10+2x20+2x30+80:2+40:2+20=?
3 ng nhanh nhất tui sẽ k
2x10+2x20+2x30+80:2+40:2+20
= 200
2x10+2x20+2x30+80:2+40:2+20=200
2 x 10 + 2 x 20 + 2 x 30 + 80 : 2 + 40 : 2 +20
=20 + 40 + 60 + 40 + 20 +20
=60 +60 +40 +20 + 20
=120+ 60+20
=180 + 20
200
fthực hiện phép tính :(2^3x9^4+9^3x45):(9^2x10-9^2)ai nhanh đúng thì mình tich cho 6sao
Bảng cửu chương 2
2x1=
2x2=
.........
2x9=
2x10=
2x1=2
2x2=4
2x3=6
2x4=8
2x5=10
2x6=12
2x8=16
2x9=18
2x10=20
đúng nha
Câu hỏi :
2x10+2x40+100:5+160:2= ?
3 người nhanh nhất mik sẽ k cho
=200 nha bạn~
Hok Tốt!
2 x 10 + 2 x 40 + 100 : 5 + 160 : 2
= 20 + 80 + 20 + 80
= 100 + 20 + 80
= 120 + 80
= 200
2 x 10 + 2 x 40 + 100 : 5 + 160 : 2
= 20 + 80 + 20 + 80
= 100 + 20 + 80
= 120 + 80
= 200
2x1= 3x1= 4x1= 5x1= 2:2= 3:3= 4:4= 5:5=
2x2= 3x2= 4x2= 5x2= 4:2= 6:3= 8:4= 10:5=
2x3= 3x3= 4x3= 5x3= 6:2= 9:3= 12:4= 15:5=
2x4= 3x4= 4x4= 5x4= 8:2= 12:3= 16:4= 20:5=
2x5= 3x5= 4x5= 5x5= 10:2= 15:3= 20:4= 25:5=
2x6= 3x6= 4x6= 5x6= 12:2= 18:3= 24:4= 30:5=
2x7= 3x7= 4x7= 5x7= 14:2= 21:3= 28:4= 35:5=
2x8= 3x8= 4x8= 5x8= 16:2= 24:3= 32:4= 40:5=
2x9= 3x9= 4x9= 5x9= 18:2= 27:3= 36:9= 45:5=
2x10= 3x10= 4x10= 5x10= 20:2= 30:3= 40:4= 50:5=
Help!
2 x 1 = 2 | 3 x 1 = 3 | 4 x 1 = 4 | 5 x 1 = 5 |
2 x 2 = 4 | 3 x 2 = 6 | 4 x 2 = 8 | 5 x 2 = 10 |
2 x 3 = 6 | 3 x 3 = 9 | 4 x 3 = 12 | 5 x 3 = 15 |
2 x 4 = 8 | 3 x 4 = 12 | 4 x 4 = 16 | 5 x 4 = 20 |
2 x 5 = 10 | 3 x 5 = 15 | 4 x 5 = 20 | 5 x 5 = 25 |
2 x 6 = 12 | 3 x 6 = 18 | 4 x 6 = 24 | 5 x 6 = 30 |
2 x 7 = 14 | 3 x 7 = 21 | 4 x 7 = 28 | 5 x 7 = 35 |
2 x 8 = 16 | 3 x 8 = 24 | 4 x 8 = 32 | 5 x 8 = 40 |
2 x 9 = 18 | 3 x 9 = 27 | 4 x 9 = 36 | 5 x 9 = 45 |
2 x 10 = 20 | 3 x 10 = 30 | 4 x 10 = 40 | 5 x 10 = 50 |
2x1=2 3x1=3 4x1=4 5x1=5 2:2= 1 3:3= 1 4:4=1 5:5=1
2x2= 4 3x2=6 4x2= 8 5x2=10 4:2= 2 6:3= 2 8:4=2 10:5=2
2x3=6 3x3= 9 4x3=12 5x3=15 6:2=3 9:3= 3 12:4=3 15:5=3
2x4=8 3x4=12 4x4=16 5x4=20 8:2=4 12:3=4 16:4=4 20:5=4
2x5=10 3x5= 15 4x5= 20 5x5= 25 10:2=5 15:3= 5 20:4=5 25:5=5
2x6=12 3x6=18 4x6= 24 5x6=30 12:2=6 18:3= 6 24:4=6 30:5=6
2x7= 14 3x7=21 4x7= 28 5x7=35 14:2=7 21:3=7 28:4=7 35:5=7
2x8=16 3x8=24 4x8= 32 5x8=50 16:2=8 24:3=8 32:4=8 40:5=8
2x9= 18 3x9= 27 4x9= 36 5x9=45 18:2=9 27:3= 9 36:9=9 45:5=9
2x10=20 3x10=30 4x10= 40 5x10=50 20:2=10 30:3=10 40:4= 10 50:5=10