Integers & Opposites
zero!
What is a terminating decimal?
A decimal that ends, stops, can't be divided anymore
What is the decimal equivalent of 4/5
0.8
Jonah’s cell phone came with 64 GB of memory. He has used 15 GB. He then uses 5 GB of memory to record photos and videos from a trip. Use an addition expression to find how much memory is left on his phone
64 + (-15) + (-5) =44 MB
248 + (-1027)
-779
On a cold winter morning, the temperature was -4°F. By noon, the temperature increased 4°. What was the temperature at noon
0 degrees!
What is the rule when multiplying integers or rational numbers?
When the signs are the same, the product is positive. When the signs are different the product is negative
0.8181818181818181......
The temperature is 1°F at dusk. It is 8 degrees colder at dawn. What is the temperature at dawn?
-7 degrees
4592 / -82
-56
Audrey deposits $27 in her account. Then she makes two withdrawals, one for $15 and one for $12. What is the total change to the balance of Audrey’s account? Explain.
No change. The amount deposited and withdrawn are the same
What is a repeating decimal?
A decimal that has a number or block of numbers that repeats foreverrrrrrr.
Lisa bought _____ gallons of gas. What decimal should the meter on the gas pump read?
19.6875
Penelope has a birdhouse that is 4 9/10 feet above the roof of her garage. She has a second birdhouse that is 5.36 feet below the roof of her garage. What is the distance between the birdhouses?
4.9-(-5.36)= 4.9+5.36 = 10.26 ft
-45 * -59
2655
A football team lost 7 yards during a play. The team had a combined gain or loss of 0 yards after the next play. What integer represents the yards gained or lost on the next play. Show on a number line to get full 400 points!
What are the rules when adding integers?
When the signs are the SAME find the SUM of their absolute values. When the signs are DIFFERENT find the DIFFERENCE of their absolute values.
-2.63+3 1/4
0.62
A boat drops an anchor 17.5 feet to the bottom of a lake. If the anchor falls at a rate of 0.07 feet each second, how long will it take the anchor to reach the bottom of the lake?
-17.5 / -0.07=250 seconds
-94/4
-23.5 or -23 1/2
A roller coaster car goes above and below ground level. The roller coaster starts at 3 meters above ground level. Then has a 7 meter drop, then rises 17 meters before dropping 8 meters. Where does the roller coaster end?
5 meter above ground
Jason spends $2.35 to buy lunch at school. If he buys a lunch on 9 days, what number represents the total change in the amount of money Jason has?
-$2.35 * 9 = -$21.15
-1/8 - 0.356
-.481
In 5 rounds of a game, Jill scored -3, 8, 9, -7, and 13. What integer represents her average score for the 5 rounds?
-3+8+9+(-7)+13=20 20/5=4
Mrs. Bright will write question on board.
and the answer is.....