Adding and Subtracting Integers
Add or subtract using positive and negative numbers:
−7 + 12 = ________
-7 + 12 = 5
Form the superlative using the adjective given.
This is the __________ (safe) neighborhood in the city.
This is the safest neighborhood in the city.
Form the comparative using the adjective given.
This book is __________ (long) than the one I read last month.
This book is longer than the one I read last month.
A freezer’s temperature goes from −18°C to 5°C. What is the range or total difference in temperature? ________
Range = Highest value - Lowest value
Range = 5 - (-18) = 23 degrees
Question:
A delivery driver earns $18 per hour and works 8 hours in one day. He spends $12 on lunch and $25 on gas. How much money does he have left at the end of the day?
Answer:
$107
Work:
18 × 8 = 144
144 − 12 − 25 = 107
Add or subtract using positive and negative numbers:
−20 + 5 = ________
-20 + 5 = -15
Form the superlative using the adjective given.
That was the __________ (hot) day of the summer.
That was the hottest day of the summer.
Form the comparative using the adjective given.
Living in the city is __________ (busy) than living in the countryside.
Living in the city is busier than living in the countryside.
The temperatures in a city this week ranged from −5°C to 12°C. What is the total difference or the range between the highest and lowest temperatures? ________
Range = Highest value - Lowest value
Range = 12 - (-5) = 17 degrees
Question:
A family buys 5 bags of rice at $8 each and 3 packs of vegetables at $4 each. They also use a $10 coupon. How much do they pay in total?
Answer:
$42
Work:
5 × 8 = 40
3 × 4 = 12
40 + 12 = 52
52 − 10 = 42
Add or subtract using positive and negative numbers:
−9 + (−4) = ________
-9 + (-4) = -13
Form the superlative using the adjective given.
This is the __________ (important) meeting of the month.
This is the most important meeting of the month.
Form the comparative using the adjective given.
Online classes are __________ (convenient) than in-person classes.
Online classes are more convenient than in-person classes.
A hiker starts at an elevation of −50 meters in a valley and climbs to 20 meters on a hill. What is the total difference in elevation or the range? ________
Range = Highest value - Lowest value
Range = 20m - (-50m) = 70 Meters
Question:
A classroom orders 6 boxes of notebooks with 12 notebooks in each box. The total cost is $216. If the class uses $36 from a fundraiser, how much money must they still pay?
Answer:
$180
Work:
216 − 36 = 180
Add or subtract using positive and negative numbers:
8 − 13 = ________
8 - 13 = -5
Form the superlative using the adjective given.
That was the __________ (bad) experience I ever had.
That was the worst experience I ever had.
Form the comparative using the adjective given.
The instructions today are __________ (clear) than yesterday’s instructions.
The instructions today are clearer than yesterday's instructions.
A submarine dives to −30 meters and then rises to 10 meters above sea level. What is the total distance it traveled or the range? ________
Range = Highest value - Lowest value
Range = 10m - (-30m) = 40 Meters
Question:
A worker earns $20 per hour and works 5 days a week for 4 weeks. Each week, $50 is taken out for taxes. How much total money does the worker take home after taxes for the 4 weeks?
(Assume the worker works 8 hours per day.)
Answer:
$3,000
Work:
20 × 8 = 160 per day
160 × 5 = 800 per week
800 − 50 = 750 per week
750 × 4 = 3,000
Add or subtract using positive and negative numbers:
15 − (−6) = ________
15 - (-6) = 21
Form the superlative using the adjective given.
She gave the __________ (interesting) presentation in the class.
She gave the most interesting presentation in the class.
Form the comparative using the adjective given.
My new job is __________ (good) than my previous job.
My new job is better than my previous job.
The stock price dropped to −8 dollars below the initial price and then rose to 15 dollars above it. What is the total change in the stock price or the range? ________
Range = Highest value - Lowest value
Range = 15 - (-8) = 23 Dollars
Question:
A restaurant prepares 240 meals in one week. The meals are divided equally among 6 days. Each day, 15 meals are given away for free. How many total meals are sold during the week?
Answer:
150 meals
Work:
240 ÷ 6 = 40 meals per day
40 − 15 = 25 meals sold per day
25 × 6 = 150