Operations with Integers
Evaluate: (−7)+12
5
Add: 1/3 + 1/6
1/2
Write as a decimal: 45%
.45
Maya bought 3 notebooks at $2.50 each and used a $5 coupon. How much did she pay?
2.50
Convert fraction to decimal: 3/4
.75
Simplify: -8 - (-15)
7
Subtract: 2 1/4 - 3/8
2 1/8
Add decimals: 3.76 + 0.845
4.605
A recipe needs 2/3 cups sugar for 1 cookie cake. If you make 3 cakes, then divide the total cookie cakes equally among 5 people, how much sugar does each person consume ?
2/5
Convert decimal to fraction: 0.125
1/8
Multiply: (-6) * 9
-54
Multiply: 3/5 * 10/9
2/3
Multiply: 0.6 × 0.25
0.15
A hiker is 120 m above sea level. She climbs 85 m, then descends 3/4 of that climb. What is her final elevation?
63.75
Convert percent to fraction and simplify: 40%
40/100 = 2/5
Divide: -56/8
-7
Divide: 7/8 / 1/4
3 1/2
Percent of a number: What is 15% of 240?
36
A laptop is $800. During a sale it’s 10% off. A student pays with a gift card of $100 and then pays the remainder plus 8% sales tax. How much does the student pay out of pocket?
669.60
Without calculating exactly, which is larger: 7/9 or 0.78?
.78
A submarine is at -120 meters, then ascends 35 meters, descends 50 meters, and ascends 80 meters. What is its final depth?
-55 meters
A student is keeping track of money in their account over several days:
-3.00
A shirt costs $36. It is on sale 25% off, then tax of 6% is added to the sale price. What is the final price? (Give exact decimal to the nearest cent.)
28.62
A store increases the price of an item by 12%. Later it marks down the new price by 15%. If the original price was $250, what is the final price?
238
Convert 11/20 to a percent and decimal. Then estimate whether 11/20 + 0.3 is closer to 1 or 0.5, and explain.
.55 = 55%
Sum 0.55 + 0.3 = .85