7th Grade Math

24 Expressions and Patterns

Text Option Take the Quick Check below. Refer to the Quick Review for help.

Are You ReadyAre You Ready

for the Chapter?for the Chapter?

Online Option Take the Online Readiness Quiz.

Add or subtract.

1. 89.3 + 16.5 2. 7.9 + 32.4


2. 24.6 - 13.3 4. 9.8 - 6.7


3. 61.14 + 21.82 6. 30.45 + 21.39


4. 20.57 - 18.2 8. 69.4 - 11.53


5. VIDEO GAMES Patrick bought the items
   shown in the table. What was the total
   cost, not including tax?
   Item Cost ($)
   Video Game 59.99
   Video Game Controller 12.95

EXAMPLE 1

Find 3.8 + 2.1.

3.8 Line up the decimal points.

(^) _+ 2.1
5.9
EXAMPLE 2
Find 37.45 - 8.52.
37.45 Line up the decimal points.
(^) __- 8.52
28.93
Multiply or divide.

10. 4 × 7.7 11. 9.8 × 3


11. 37.49 ÷ 4.6 13. 14.31 ÷ 2.7


12. 2.7 × 6.3 15. 8.5 × 1.2


13. 6.16 ÷ 5.6 17. 11.15 ÷ 2.5


14. PIZZA Four friends decided to split
    the cost of a pizza evenly. How much
    does each friend need to pay?

EXAMPLE 3

Find 1.7 × 3.5.

1.7 1 decimal place

(^) _____× 3.5 + 1 decimal place
5.95 2 decimal places
EXAMPLE 4
Find 24.6 ÷ 2.5.
2.5  24.6 25.  246. Multiply both numbers
by the power of 10.
9.84
25  246.00 Annex zeros.

• 225
  210 Divide as with


• 200 whole numbers.
  100


• 100
  0

You have two options for checking

prerequisite skills for this chapter.

$25.48

Pizza

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