Subtracting Rational Numbers
Add these rational numbers.
-12.4 - (-8.39)
-4.01
Multiply rational numbers
0.47 * 5.6
2.632
What is the simplified fraction equivalent of:
0.5
1/2
Your answer is always _______________ when multiplying or dividing the same sign?
Positive
In the morning the temperature is 54.8 degrees. By the time the sun set, the temperature was at -6.4 degrees. What was the change in temperature?
-61.2 or it dropped 61.2 degrees
Add these rational numbers.
-2/3 + (-3/4)
-1 5/12
Multiply rational numbers
2.3*(-1.4)*1.1
-3.542
What is the decimal equivalent of:
3/5
0.6
Your answer is always _______________ when multiplying or dividing the different signs?
Negative
Todd free dove into the ocean from a helicopter that was hovering 56.3 feet above sea level. He reached 14.7 feet below sea level before coming back to the surface. What is the distance between the helicopter and how deep Todd went before coming back up?
70 feet
Add these rational numbers.
-3 1/3 - 2 1/2
-5/6
Multiply rational numbers (Simplify any FRACTION answers)
-5 2/3*(-1 1/2)
8 1/2
What is the decimal equivalent of:
13/3
4.333...
What is the rule when adding and the signs are different?
- Subtract
- Take the sign of the larger number
The bottom of a pylon is 3 1/2 yards below the ground. The top of the pylon is 2 1/2 yards above ground. How tall is the pylon?
6 yards
What is the sum? Write answer in decimal form
-2.5 + 3 1/5 + (-1.25)
-0.55
What is the value of the expression? Write your answer as a decimal
-6.75 * (6/10 + 4/5)
-9.45
What is the simplified fraction equivalent of:
5.25
5 1/4
What is the rule when adding and the signs are the same?
Add and keep the sign
A researcher in a personal submarine begins at the surface of the ocean. The submarine descends 20.6 meters and then ascends 5 7/10 meters. What is the depth of the personal submarine? Write answer as a fraction
14 8/10 or 14 4/5
Find the sum. Write answer in decimal form
-4 1/4 + 4/5 + (-6.8)
-10.85
What is the value of this expression? Write your answer as a simplified fraction
-3.5 * (1 1/2 - 2 3/4)
4 3/8
What is the simplified fraction equivalent of:
6.82
and
What is the decimal form of:
32/9
6 41/50 and 3.444...
What is the rule when subtracting and one or both numbers are negative?
add the opposite or KCC
- keep the first number the same
- change subtraction to addition
- change the second number to it's opposite sign
Manuel climbs a tower from ground level to an elevation of 135 1/2 feet. He then climbs down 24 1/4 feet. How far is Manuel from the ground?
111 1/4