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Math grade 4, March, 2015

Ex 1 : The perimeter of a square is 96 cm. The area of a parallelogam is equal as the area of thát square. What is the height of the parallelogram if the bottom if 36 cm long. (32; 16; 8; 256)

Ex 2: Calculate:

3248 x 246 – 3248 x 123 – 3248 x 23

a/ 3248 ; b/ 32480 ; c/ 324800 ; d/ 3248000

Ex 3: The product of two mumbers is 5320. If we multiply a factor to five , reduce the other factor twice, then the new product is ......

a/ 53200 ; b/ 13300 ; c/ 532 ; d/ 1330

Ex 4 : The sum of the two number is equal as its diferrence and equal as 2014. What are the two numbers?

a/ 2013 and 1 ; b/ 2000 and 14 ; c/ 1007 and 1007 ; d/ 2014 and 0

Ex 5: A saler sold 3/5 of the mangos for the first time. Then he sold 3/5 mangos of the number he sold for the first time. How many mangos did he left?

a/ 1/25 ; b/ 16/25; c/ 1/5 ; d/ 4/5

Ex 6:The average of two odd numbers is 950. What are the two numbers if there are exactly 91 even numbers between them?

a/ 859 and 1041 ; b/ 857 and 1043 ; c/ 861 and 1039; d/ 860 and 1040

Ex 7: The average of 15 consicutive odd numbers if 121. So the greatest number of the sequence is:

a/ 141 ; b/ 133 ; c/ 135 ; d/ 137

Ex 8: Compare A to 1, if A= 1/5 + 1/6 + 1/7 + 1/8 + 1/9

a/ A > 1 ; b/ A<1 ; c/ can be compared ; d/ A=1

Ex 9: How many numerals between 1 and 100 that individed by 9.

a/ 11 digits ; b/ 90 digits ; c/ 10 digits; d/ 89 digits

Ex 10: A rectanger has a perimeter of 220m. If we add 5m to the length and reduce 5 from this reactanger so the area will be 225 spm left. The area of the yard is first is......

a/ 250m ; b/ 2625m ; c/ 2175m ; d/ 2400m

Ex 11.

Mrs Tuoi has a can of milk. 2/3volume of the total in the can is 3/10 kilograms. How weigh is the milk in the can by gram?

Ex 12. Find M if ¼ x 1/5 x M = ½.

Ex 13. How many natural numbers between 1000 and 4000 are there for wich the thousands digit equals the sum of the other three digits?

A. 12 B. 16 C. 19 D.20

Ex 14. Bob buys threes times á many as Peter . Mia buys 3 apples more than Peter and 11 apples more than Bob. How many apples do they buy together?

A. 28 apples B. 29 apples C. 38 apples D. 31 apples

Ex 15. Jane bought many of apples. She gave 2/5 of them for her bést friend, then she has 15 apples now. How many apples did she buy?

Ex 16. Find the quotient of a division if it`s about 1/6 of the dividend and 4 times as much as the divisor .

Ex 17. When you multiply a number with 136, North had inadvertently placed the calculations are lined as in as in addition to the results should be2500. Please find the correct area of that multiplication.

Ex 18. A fabrics shop are selling cloth, they sell 1/10 that cloth for every sale. After seven times, the cloth is 21 meters long. How long is the cloth at first by meters.

Ex 19. A water hose into the tank fully for 2 hours , How long does it take if there are two taps so the flow is full?

Ex 20. A man rides a motocycle in one fifth of an hour for a distance of 7km80m. How far does he travel in one minute by metter?

Ex 21. The price of a book is 120000 thousand dollars. If the price is reduced by three tenth, how much will the book be?

Ex . How many 4-digit number that is divisible by both 2 and 5?

enter the appropriate number:

Ex 23:

Find Y that : 65/91= y/133 – 5/133. Y = ? …..

Ex 24.

At first, Hoa made more than 24 flowers. She gave her friend a half of those flowers. After that, she made some more, so she has 14 flowers. How many flowers đid she has at first.?

Ex 1 : The perimeter of a square is 96 cm. The area of a parallelogam is equal as the area of thát square. What is the height of the parallelogram if the bottom if 36 cm long. (32; 16; 8; 256)

Ex 2: Calculate:

3248 x 246 – 3248 x 123 – 3248 x 23

a/ 3248 ; b/ 32480 ; c/ 324800 ; d/ 3248000

Ex 3: The product of two mumbers is 5320. If we multiply a factor to five , reduce the other factor twice, then the new product is ......

a/ 53200 ; b/ 13300 ; c/ 532 ; d/ 1330

Ex 4 : The sum of the two number is equal as its diferrence and equal as 2014. What are the two numbers?

a/ 2013 and 1 ; b/ 2000 and 14 ; c/ 1007 and 1007 ; d/ 2014 and 0

Ex 5: A saler sold 3/5 of the mangos for the first time. Then he sold 3/5 mangos of the number he sold for the first time. How many mangos did he left?

a/ 1/25 ; b/ 16/25; c/ 1/5 ; d/ 4/5

Ex 6:The average of two odd numbers is 950. What are the two numbers if there are exactly 91 even numbers between them?

a/ 859 and 1041 ; b/ 857 and 1043 ; c/ 861 and 1039; d/ 860 and 1040

Ex 7: The average of 15 consicutive odd numbers if 121. So the greatest number of the sequence is:

a/ 141 ; b/ 133 ; c/ 135 ; d/ 137

Ex 8: Compare A to 1, if A= 1/5 + 1/6 + 1/7 + 1/8 + 1/9

a/ A > 1 ; b/ A<1 ; c/ can be compared ; d/ A=1

Ex 9: How many numerals between 1 and 100 that individed by 9.

a/ 11 digits ; b/ 90 digits ; c/ 10 digits; d/ 89 digits

Ex 10: A rectanger has a perimeter of 220m. If we add 5m to the length and reduce 5 from this reactanger so the area will be 225 spm left. The area of the yard is first is......

a/ 250m ; b/ 2625m ; c/ 2175m ; d/ 2400m

Ex 11.

Mrs Tuoi has a can of milk. 2/3volume of the total in the can is 3/10 kilograms. How weigh is the milk in the can by gram?

Ex 12. Find M if ¼ x 1/5 x M = ½.

Ex 13. How many natural numbers between 1000 and 4000 are there for wich the thousands digit equals the sum of the other three digits?

A. 12 B. 16 C. 19 D.20

Ex 14. Bob buys threes times á many as Peter . Mia buys 3 apples more than Peter and 11 apples more than Bob. How many apples do they buy together?

A. 28 apples B. 29 apples C. 38 apples D. 31 apples

Ex 15. Jane bought many of apples. She gave 2/5 of them for her bést friend, then she has 15 apples now. How many apples did she buy?

Ex 16. Find the quotient of a division if it`s about 1/6 of the dividend and 4 times as much as the divisor .

Ex 17. When you multiply a number with 136, North had inadvertently placed the calculations are lined as in as in addition to the results should be2500. Please find the correct area of that multiplication.

Ex 18. A fabrics shop are selling cloth, they sell 1/10 that cloth for every sale. After seven times, the cloth is 21 meters long. How long is the cloth at first by meters.

Ex 19. A water hose into the tank fully for 2 hours , How long does it take if there are two taps so the flow is full?

Ex 20. A man rides a motocycle in one fifth of an hour for a distance of 7km80m. How far does he travel in one minute by metter?

Ex 21. The price of a book is 120000 thousand dollars. If the price is reduced by three tenth, how much will the book be?

Ex . How many 4-digit number that is divisible by both 2 and 5?

enter the appropriate number:

Ex 23:

Find Y that : 65/91= y/133 – 5/133. Y = ? …..

Ex 24.

At first, Hoa made more than 24 flowers. She gave her friend a half of those flowers. After that, she made some more, so she has 14 flowers. How many flowers đid she has at first.?