Multiplying Integers
-5x2
-10
25+(-10)
15
-10/5
-2
-5-10
-15
A baker uses 2.5 cups of flour for each batch of cookies. If she makes 4 batches, how much flour does she use in total?
Multiply cups per batch by number of batches: 2.5×4=10
-3x12
-36
During a video game, a player loses 15 points in the first round and gains 20 points in the second round. What is the player’s total score change?
Equation: −15+20=5
Answer: The player’s score increased by 5 points overall.
A teacher has 48 pencils and wants to distribute them equally among 6 students. How many pencils will each student receive?
Equation: 48÷6=8
Answer: Each student will receive 8 pencils.
The temperature in the afternoon was 12∘F. By evening, it dropped by 18 degrees. What is the temperature in the evening?
Equation: 12−18=−6
Answer: The temperature in the evening is –6°F.
A student had 85 points on a test. After a correction, 15 points were taken away. What operation helps find the new score?
Subtract points taken away: 85−15=70
5x10
50
-50+(-25)
-75
-24/-12
2
32-(-63)
95
A box of cereal weighs 1.2 pounds. If each serving is 0.3 pounds, how many servings are in the box?
Divide total weight by serving size: 1.2÷0.3=4 servings
A mountain climber descends 150 meters each hour. If she climbs down for 6 hours, how many meters does she descend in total?
Equation: −150×6=−900-150 \times 6 = -900
Answer: She descends a total of 900 meters.
The temperature in the morning was −8∘F. By the afternoon, it increased by 12 degrees. What is the temperature in the afternoon?
Equation: −8+12=4
Answer: The temperature in the afternoon is 4°F.
48/-2
-24
-4-(-12)
8
A hiker climbs 250 feet in the morning and then climbs another 180 feet in the afternoon. What is the total elevation gained?
addition
A submarine dives 120 feet below sea level every hour. After 4 hours, how far below sea level is the submarine?
Equation: −120×4=−480
Answer: The submarine is 480 feet below sea level.
30+123
153
A hiker descends a total of 600 feet over the course of 4 hours. If the descent was steady each hour, what was the change in elevation per hour?
Equation: −600÷4=−150
Answer: The hiker’s elevation changed by –150 feet per hour.
A scuba diver was 30 feet below sea level. She swam up 45 feet toward the surface. What is her new position relative to sea level?
Equation: −30+45=15
Answer: The diver is now 15 feet above sea level.
1+0
1