Variables, and expressions, and equations OH MY!

Ms. Sarah has 8 boxes of crayons. Each box has 144 crayons. Which equation could be used to find p, the total number of crayons in these boxes?

• p $\div$ 8 = 144

• 144 - p = 8

• p x 8 = 144

• 144 + 8 = p

Which pattern uses the rule, “add 3, multiply 2”?

• 4, 7, 14, 17, 19, 38, 41

• 4, 7, 14, 17, 20, 40, 43

• 4, 7, 14, 17, 34, 37, 74

• 4, 7, 14, 17, 20, 22, 44

Which should replace the y in the equation?

4 x (y + 4) = 36

• 5

• 6

• 8

• 9

Mary bought 128 cans of cat food. She used the equation below to find w, the number of weeks the cat food will last if her cat eats 4 cans of food each week.
128 $\div$  w = 4
How many weeks will the cat food last?

• 512 weeks

• 124 weeks

• 42 weeks

• 32 weeks

Which should replace the b in the equation?

3 x (b +2) = 18

• 4

• 6

• 13

• 16

Rosie bought 12 vases of flowers. Each vase contains an equal number of flowers. She gave away 8 of these vases of flowers. There are a total of 72 flowers in the vases Rosie has left. The equation below can be used to find f, the number of flowers in each vase.

(12 - 8) x f = 72

How many flowers are in each of these vases?

• 12

• 18

• 8

• 14

Which rule BEST describes the relationship between x and y in the table above?

• divide x by 5

• subtract 15 from x

• multiply x by 5

• add 25 to x

The table shows x and y values for the equation y = 6x. What is the missing number in this table?

• 30

• 48

• 18

• 42

What is the rule in the above table? Find the missing number.

• rule add 7, 22

• rule multiply by 7, 105

• rule subtract 7, 8

• rule divide by 7, 2

Sam has 18 seashells in a box. He collected 7 more seashells on the beach. Sam sorted all of the seashells into 5 equal groups. The equation below can be used to find s, the number of seashells in each group. How many seashells are in each group?
(18 + 7) $\div$   s = 5

• 30

• 25

• 5

• 3