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1. Estimate the product. 5,287 × 63
2. Estimate the quotient. 179 ÷ 4
3. A regional manager is ordering iPhones for the 5 stores in the region. How many iPhones will each store get if he orders 340 iPhones, and each store receives an equal number of iPhones? (find an exact answer)
1. Estimate the product. 5,287 × 63
2. Estimate the quotient. 119 ÷ 4
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Get out last night’s homework.
• numerical expression- a combination of numbers and operations
• order of operations- tells you which operations to solve first
• Find the value of expressions using the order of operations.
Use Order of Operations
Find the value of the expression 6 + 3 ● 9.
6 + 3 ● 9 = 6 + 27 Multiply 3 and 9.
= 33 Add 6 and 27.
Answer: 33
Use Order of Operations
Find the value of the expression 4 + (10 – 3).
4 + (10 – 3) = 4 + 7 Subtract 3 from 10 first.
= 11 Add 4 and 7.
Answer: 11
A. A
B. B
C. C
D. D
A. 17
B. 48
C. 72
D. 135
Find the value of the expression 3 + 5 × 9.
Parentheses
Evaluate the expression 90 ÷ 3 + (3 – 2) – 20.
90 ÷ 3 + (3 – 2) – 20 = 90 ÷ 3 + 1 – 20 Subtract 2 from 3.
= 30 + 1 – 20 Divide 90 by 3.
= 31 – 20 Add 30 and 1.
= 11 Subtract 20 from 31.Answer: 11
1. A
2. B
3. C
4. D
A. 6
B. 18
C. 24
D. 36
Find the value of the expression 21 – 6 + 9.
1. A
2. B
3. C
4. D
A. 73
B. 124
C. 177
D. 364
Evaluate the expression 85 ÷ 5 + 14 × (12 – 8).
Parentheses
Find the value of the expression 4 + 5 ● 2 – 1.
4 + 5 × 2 – 1 = 4 + 10 – 1 Multiply 5 and 2.
= 14 – 1 Add 4 and 10.
= 13 Subtract 1 from 14.
Answer: 13
Use Order of Operations
Evaluate the expression 7 + 4(10 – 3).
7 + 4(10 – 3) = 7 + 4(7) Subtract 3 from 10 first.
= 7 + 28 Multiply 4 and 7.
= 35 Add 7 and 28.
Answer: 35
Apply Order of Operations
MONEY Trina, her parents, and her grandmother eat lunch at a diner. Each person orders a soda, a sandwich, fries, and dessert. Find the total cost of the meal.
To find the total cost, write an expression and then find its value using the order of operations.
4 × $1 + 4 × $5 + 4 × $2 + 4 × $3
= $4 + 4 × $5 + 4 × $2 + 4 × $3 Multiply 4 and 1.
= $4 + $20 + 4 × $2 + 4 × $3 Multiply 4 and 5.
= $4 + $20 + $8 + 4 × $3 Multiply 4 and 2.
= $4 + $20 + $8 + $12 Multiply 4 and 3.
= $44 Add 4, 20, 8, and 12.Answer: The total cost of the meal is $44.
Apply Order of Operations
A. $112
B. $115
C. $123
D. $125
CLOTHING Maris is shopping at a new clothing store. T-shirts are priced at $9 each, jeans are priced at $17 per pair, and sweaters are priced at $14. Maris buys 4 t-shirts, 2 pairs of jeans, and 3 sweaters. Find the total cost of her purchases.
