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I'm sorry to say that I don't see any mathematical expressions. And you should translate your questions into Vietnamese so all people can answer them.
I am very sorry but I cannot see any numbers to answer your questions
1 . his name nam
2. he is twenty-three years old
3. he is an engineer
4.five people in his family
5. his father is fifty
6. yes,he does
7. his mother is forty-eight years old
8. thiếu đề
themed all have schemes
children: | --- | --- |
Dad: | --- | --- | --- | --- | --- | --- | --- | --- |
Offset is equal parts
8-2 = 6 (part)
the child's age
30: 6 x 2 = 10 (years old)
the father's age
10 + 30 = 40 (years old)
answer: children 10 years of age; 40 year old father
dịch
theo đề bài ta có sơ đồ
con :|---|---|
cha :|---|---|---|---|---|---|---|---|
hiệu số phần bằng nhau là
8-2=6(phần)
số tuổi con là
30:6 x 2=10(tuổi)
số tuổi cha là
10+30=40(tuổi)
đáp số : con 10 tuổi; cha 40 tuổi
Lại nhầm nữa
Con:|-----|-------|
Cha:|------|-------|------|--------|-----|--------|---------|--------|
Tuổi con hiện nay là:30:(8-2) x 2=10( tuổi)
Tuổi cha hiện nay là:10+30=40( tuổi)
A ) Calculate 2 + 4 + 6 + 8 +…..+ 200 = \(2\left(1+2+3+..+100\right)=2\times100\times\frac{101}{2}=10100\)
B ) Calculate 111 : 3 + 222 : 6 + 333 : 9 + 444 : 12 =\(37+37+37+37=148\)
C ) This year, George is 5 years old; his dad is 35 years old. After how many years, his dad is 4 times older than George?
five year
D ) 1st of July 2014 is Tuesday, what day is 30th July 2014?
is Thursday
E ) There are a total of 28 roosters and rabbits in a cage. there are 80 legs altogether, calculate the total numbers of roosters.
sixteen roosters
F ) Calculate 9999 x 0.7 + 1111 x 2.7 = \(1111\times5,3+1111\times2,7=1111\times7=7777\)
G ) Calculate 13.8 x 4.6 x 5.4 : 1.38 : 2.3 : 2.7 = \(\frac{13,8}{1,38}\times\frac{4,6}{2,3}\times\frac{5,4}{2,7}=10\times2\times2=40\)