math WGU

Students were divided into 10 teams with 12 on each team. Later, the same day students were divided into teams with 4 on each team. How many teams were there then?

30

Divide using the division algorithm and check by using the related multiplication. 7 ÷ 216

30 R 6

4 ____ 8 × 6 7. 4 _______________________ 1 ____ 9 2 3 1 ____ 6 ___ 6 8 8 _______________________ 3. 0 1. 9 ____ 2

4 7 3 2 5

Write a related multiplication sentence. 12 ÷ 4 = 3

4 × 3 = 12

Write a related multiplication sentence. 10 ÷ 5 = 2

5 × 2 = 10

Using a calculator, Nancy multiplied by 5 when she should have divided by 5. The display read 150. What should the correct answer be?

6

Sue claims the following is true by the distributive property, where a and b are whole numbers. 11(ab) = (11a)(11b)

Her claim is false; consider the example when a = 1 and b = 2

Place parentheses, if needed to make the following equations true. I. 4 + 3 × 3 = 21. III. 5 + 4 + 9 ÷ 9 = 2 II. 9 ÷ 3 + 1 = 4. IV. 5 + 6 ÷ 2 + 3 = 11

I. (4 + 3) × 3 = 21 II. 9 ÷ 3 + 1 = 4 III. (5 + 4 + 9) ÷ 9 = 2 IV. 5 + 6 ÷ 2 + 3 = 11

Is x ÷ x always equal to 1? Explain

No, because if x is 0, the division is undefined

In each of the following, tell what computation must be done last. a. 7 × 3 - 4 × 6 + 2 b. 12 - 7 × 5 + 4 ÷ 2 c. 11 - 6 ÷ 3 × 7 d. 8 + 4 (4 - 3)2

a. -3 + 2 b. -23 + 2 c. 11 - 14 d. 8 + 2

Perform the following multiplication using the lattice multiplication algorithm. a. 263. b. 346 × 63. × 82 ____________. __________

a. 16569 b. 28372

For each of the following, find the whole number to make the statement true, if possible. a. 54 ÷ 6 = ______ b. ____ ÷ 30 = 0 c. 6 ÷ ______ = 2

a. 9 b. 0 c. 3

For each of the following find the whole number that will make the equation true. a. 3 × z = 21 b. 18 = 9 + 3 × z c. z × (7 + 3) = z × 7 + z × 3

a. z = 7 b. z = 3 c. z = R