200 x 20 = ???
Chọn các đáp án đúng:
(200 - 20) - 2 = 200 - (20 - 2)
(200 x 20) x 2 = 200 x (20 x 2)
(200 : 20) : 2 = 200 : (20 : 2)
(200 + 20) + 2 = 200 + (20 + 2)
(200 - 20) - 2 = 200 - (20 - 2) : Sai
(200 x 20) x 2 = 200 x (20 x 2) : Đúng
(200 : 20) : 2 = 200 : (20 : 2) : Sai
(200 + 20) + 2 = 200 + (20 + 2) : Đúng
tìm x:
x + 20 + 20 = 200 + 200 - 10
x+20+20=200+200-10
x+20+20=400-10
x+20+20=390
x+40 =390
x=390-40
x=350
chuc bn hoc gioi!
x + 20 + 20 = 200 + 200 - 10
x + 20 + 20 = 390
x + 40 = 390
x = 390 - 40
x = 350
x + 20 + 20 = 200 + 200 - 10
x + 20 + 20 = 390
x + 40 = 390
x = 390 - 40
x = 350
k mik
Tính giá trị biểu thức sau :
a ) 200 - 30 x 20 + 100
b ) 200 - 300 + 20 x 30
a ) 200 - 30 x 20 + 100
= 200 - 600 + 100
= -300
b ) 200 - 300 + 20 x 30
= 200 - 300 + 600
= 100 + 600
= 700
Tính giá trị biểu thức sau :
a ) 200 - 30 x 20 + 100
= 200 - 600 + 100
= - 400 + 100
= - 300
b ) 200 - 300 + 20 x 30
= 200 - 300 + 600
= - 100 + 600
= 500
1 x 1 =
10 x 10 =
100 x 100 =
2 x 2 =
20 x 20 =
200 x 200 =
nhớ kết bạn nha mình sẽ tk cho
1x1=1
10x10=100
100x100=10000
2x2=4
20x20=400
200x200=40000
1x1=1
10x10=100
100x100=10000
2x2=4
20x20=400
200x200=40000
1x1=1
10x10=100
2x2=4
20x20=400
200x200=40000
97/20 x ( 25/8 - 221/200 )< x < 91/10 x (137/20 + 11/4)
Đề bài : \(\dfrac{97}{20}\times\left(\dfrac{25}{8}-\dfrac{221}{200}\right)< x< \dfrac{91}{10}\times\left(\dfrac{137}{20}+\dfrac{11}{4}\right)\)
\(\dfrac{97}{20}\times\left(\dfrac{25}{8}-\dfrac{221}{200}\right)=\dfrac{97}{20}\times\dfrac{101}{50}=\dfrac{9797}{1000}\)
\(\dfrac{91}{10}\times\left(\dfrac{137}{20}+\dfrac{11}{4}\right)=\dfrac{91}{10}\times\dfrac{48}{5}=\dfrac{2184}{25}=\dfrac{2184\times40}{25\times40}=\dfrac{87360}{1000}\)
\(\Rightarrow\dfrac{9797}{1000}< x< \dfrac{87360}{1000}\)
Vậy \(x\in\left(\dfrac{9797}{1000};\dfrac{87360}{1000}\right)\)
x + 20 x 5 = 60 + 200
x+20.5=60+200
x+20.5=260
x+100=260
x=260-100
x=160
x + 20 x 5 = 60 + 200
x + 100 = 260
x = 260 - 100
x = 160
~nha bn~
x + 20 x 5 = 60 + 200
x + 20 x 5 = 260
x + 20 = 260 : 5
x + 20 = 52
x = 52 - 20
x = 32
k nha
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
x + 20 = 200
97/20 - ( 25/8 - 221/200 )< x < 91/10 - (137/20 - 11/4)
phần mik gửi vừa nãy là vt nhầm , nên mik gửi lại