# Review of Division - grade 4

This is a review lesson with a variety of exercises for fourth grade division topics. It includes exercises for order of operations, mental division problems, division with remainders, long division, word problems, divisibility, finding factors, and prime numbers.

1. Solve.

 a. 20 ÷ 10 + 15 = _______ 20 × 10 + 15 = _______ b. (200 + 100) ÷ 5 = ______  200 + 100 ÷ 5 = _______ c.  10 × 12 + 40 ÷ 10 = _______ 10 × (12 + 40) ÷ 10 = ______

2. Solve mentally.

 a.  3,100 ÷ 100 = ______      450 ÷ 10 = _______ b.  240 ÷ 20 = _______     800 ÷ 40 = _______ c.  4,200 ÷ 600 = _______     3,200 ÷ 80 = _______

3. Solve.

 a. 45 ÷ 6 = ______ R ____ 46 ÷ 6 = ______ R ____ b. 12 ÷ 7 = ______ R ____ 27 ÷ 8 = ______ R ____ c. 31 ÷ 4 = ______ R ____ 56 ÷ 9 = ______ R ____

4. Divide and check your work.

 a.  708 ÷ 3      Check: b.  1,504 ÷ 8      Check: 5. Divide and check your work.

 a.  392 ÷ 5      Check: b.  2,845 ÷ 6      Check:  6. Harry has 288 seashells, and Timmy has
one fourth of that amount. How many does
Timmy have?

7. Mark's 70 candles were packaged into boxes.
Twelve candles fit in each box.

a. How many boxes became full?

b. How many candles were in the box that was
not full?

8. Four yards of material cost \$38.88.
How much does one yard cost?

9. John's test scores were 92, 85, 89, 75,
and 89. Find his average score.

10. Mark an X if the number is divisible by 3, 5, or 10.

 Number 13 40 57 135 354 2,380 Divisible by 3 Divisible by 5 Divisible by 10

11. Fill in.

 a. Is 7 a factor of 64? _____, because ___________________________. b. Is 98 a multiple of 2? _____, because __________________________. c. Is 76 divisible by 8? _____, because ___________________________. d. Is 30 a factor of 30? _____, because __________________________.

12. Check if these numbers are primes or composites. Use the divisibility rules for 2, 3, and 5 to help you.

 a. 87 is prime/composite If composite:87 = ____ × ____ b. 89 is prime/composite If composite:89 = ____ × ____ c. 91 is prime/composite If composite:91 = ____ × ____

13. Find all the factors of the given numbers.

 a. 24 Check 1 2 3 4 5 6 7 8 9 10   factors: ______________________________ b. 27 Check 1 2 3 4 5 6 7 8 9 10   factors: ______________________________ c. 66 Check 1 2 3 4 5 6 7 8 9 10   factors: ______________________________ d. 75 Check 1 2 3 4 5 6 7 8 9 10   factors: ______________________________ Imagine you divided all numbers from 1 to 100 by 6.   Which ones of those numbers would have   a remainder of 5, when divided by 6?

This lesson is taken from Maria Miller's book Math Mammoth Division 2, and posted at www.HomeschoolMath.net with permission from the author. Copyright © Maria Miller.

#### Math Mammoth Division 2

A self-teaching worktext for 4th grade that covers long division, finding fractional parts with division, word problems, remainder, average, and divisibility.