Question

[A Toi Mua]

Question 1:
Calculate:  Question 2:
Find  if .
Answer:  Question 3:
Calculate:   Question 4:
If ;  and  then  Question 5:
Jane had  dollars. She bought  of mangoes at  dollars per kg.
How much money did she have left? Answer:  dollars. Question 6:
of sugar cost  dollars. Mary bought  of sugar and she had  dollars left.
How much money did she have at first? Answer:  dollars Question 7:
If ;  and  then  Question 8:
The area of a rectangle is . If its length is decreased by 5 times and its width is increased by 6 times then its area will equal   Question 9:
.
The missing number is Fill in the blank with the suitable number Question 10:
The length of a rectangle is  and its width is .
The area of this rectangle is  .

Answer 1

[Nguyễn Như Nguyệt]

Question 1:
Calculate:  Question 2:
Find  if .
Answer:  Question 3:
Calculate:   Question 4:
If ;  and  then  Question 5:
Jane had  dollars. She bought  of mangoes at  dollars per kg.
How much money did she have left? Answer:  dollars. Question 6:
of sugar cost  dollars. Mary bought  of sugar and she had  dollars left.
How much money did she have at first? Answer:  dollars Question 7:
If ;  and  then  Question 8:
The area of a rectangle is . If its length is decreased by 5 times and its width is increased by 6 times then its area will equal   Question 9:
.
The missing number is Fill in the blank with the suitable number