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=> 3(a+b+c+d)=210+170+180+130=690
a+b+c+d=690:3=230
=> a=230-170=60
b=230-180=50
c=230-130=100
d=230-210=20
đáp số : a=60;b=50;c=100;d=20
các bn cho mk vài li-ke cho tròn 670 với
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a+b+c+b+c+d+c+d+a+d+a+b
=> 3a+3b+3c+3d=154+137+187+167=645
=> 3(a+b+c+d)=645
=> a+b+c+d=215
=> d=215-(a+b+c)=215-154=61
=> a=215-(a+c+d)= 215-137=78
=> b=215-(c+d+a)=215-187=28
=> c=215-(d+a+b)=215-167=48
Vậy a=78;b=28;c=48;d=61
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tu do ta co : (a+b+c)+(b+c+d)+(c+d+a)+(d+a+b)=93+102+106+113=414
=> 3(a+b+c+d)=414 =>a+b+c+d=138
lai co a+b+c=93 =>d=138-93=45;
tuong tu =>a= 138-102=36; b= 108-106 =32; c=138-113=25
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Đề hơi vô lí
nếu axa=b thì bxb chắc chắn sẽ lớn hơn 10
a =1 vì axa=b=1x1=1
bxb=d=1x1=1
a+d=e=1+1=2
Tổng a+b+d+e=5
Vậy c= 10
nhưng vì c là số tự nhiên có một chữ số nên đề bài sai
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9m6dm=960cm
trong phép chia cho 5 số dư lớn nhất có thể là 4
cạnh hình vuông có diện tích 81cm2 là 9cm
k mình nha
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1. What are they doing? – They are _____ with paper boat.
A. doing
B. making
C. playing
2. Has she got any pet? – No, she_____.
A. has
B. hasn’t
C. haven’t
3. How many ______ are there in your bedroom? – There are two.
A. chair
B. chairs
C. x
4. What’s Mai doing? – She ______.
A. play cycling
B. cycling
C. cycles
5. How old is your_______? – He’s thirty-four.
A. sister
B. mother
C. father
6. What is the ---------- today?
A. activity
B. colour
C. weather
7. --------- many cats do you have?
A. Why
B. How
C. What
8. what _____ are your dogs? – They are black and white.
A. colour
B. yellow
C. sunny
9. ……………is that man? - He is my father
A. Who
B. What
C. He
D. His
10. My brother is twelve years ………
A. age
B. how
C. old
D. new
11. There ……..a garden in my house
A. be
B. is
C. are
D. aren’t
12. There is a pond ……….. front of my house.
A. in
B. off
C. to
D. of
13. ……there a garden in your house?
A. Are
B. Is
C. What
D. Where
14. The gate ……….the house is blue
A. of
B. for
C. to
D. in
15. ……… are my books? -They’re on the desk
A. What
B. Where
C. What
D. How
16. There are two pictures ………..the wall
A. in
B. above
C. on
D. to
17. There is a chair between the table……… the wardrobe
A. and
B. in
C. on
D. or
18. How……….. chairs are the in the classroom?
A. old
B. much
C. many
D. long
19. Are there …………posters on the wall?
A. any
B. a
C. one
D. the
20. Are there any chairs in the room? - No, There …………….
A. are
B. is
C. aren’t
D. isn’t
d = 4
a+b+c+d=22
gõ thiếu à bạn ?