Rational Number Applications
21 + (-23)
-2
-12(-5)
60
Use the BOTTOM display that Mr. Gregory shows to solve these questions:
1) What integer is represented by the tiles?
2) How many groups of -2 can I split the picture up into?
3) Write and solve the division problem being done.
1) -12
2) 6
3) -12 / 6 = -2 OR -12 / -2 = 6
-15 + (-12)
-27
36 / (-9)
-4
Mr. Gregory will rewrite this to make it clearer.
-5 1/4 + (-7/8)
-6 1/8
Answer the following question using the TOP display Mr. Gregory gives:
1) How many zero pairs could you make?
2) Will your answer be positive or negative?
3) Write AND solve the problem represented with tiles.
1) 4
2) Positive
3) 5 + (-4) = 1
5 - (-2)
7
-6(-7)
42
Mr. Gregory will rewrite this to make it clearer.
4 2/5 + (-2 1/10)
2 1/10
You are hiking on a mountain and start at an elevation of 50 feet. You descend 10 feet. You ascend 20 feet. You descend 65 feet. What is your ending elevation?
-5 feet
-12 - (-7)
-5
-24 / (-6)
4
(Mr. Gregory will rewrite this to make it clear)
-3 1/5 + 1/2
-2 7/10
-2.7
Mr. Gregory will rewrite this to make it clearer.
(-15)(1/5)(-3/4)(-1/3)
-3/4
-0.75
On Monday, the temperature started at 47.6 degrees Fahrenheit. On Tuesday, the temperature dropped by 22.5. On Wednesday, the temperature dropped by 40.1. And on Thursday, the temperature raised by 10 1/2 degrees.
What is the temperature on Thursday?
-4.5 degrees
-41 - 20
-61
(5)(-3)(-2)(4)
120
Mr. Gregory will rewrite this to make it clearer.
6 3/4 + (-5/8)
6 1/8
(5)(8)(0.2)(-0.5)
-4