Decimal Operations (No Calculator)
2.5 + (–1.1)
1.4
Solve: 1/2 + 1/4
3/4
Repeating Decimals
What are... decimals that have repeating digits and never end?
What is the sum: –7 + (–5)?
-12
The fastest 6th grade 100-meter dash run time this year was 9.8 seconds. The fastest 7th grade 100-meter dash run time was 9.2 seconds. How much faster was the 7th grade time? LABEL YOUR ANSWERS!
.6 seconds
–3.6 – (–1.2)
-2.4
Solve: 2/3 - 1/6
1/2
Terminating Decimal
What are decimals that do not have repeating digits and have an end at some point?
Subtract: –8 – (–3)
–5
I am planning to make some banana bread for my 7th grade advisory. The recipe calls for 3/4 cup brown sugar. If I quadruple the recipe, I'll have enough for my homeroom students. How many cups of sugar will I need if I make enough banana bread for my homeroom math classes?
3 cups
2.3 + 3/10
Decimal form: 2.6
Fraction form: 13/5
Mixed number form: 2 3/5
Add: -3/5 + 7/10
1/10
Bar Notation
A line over a digit in a decimal that indicates a repeating digit
A submarine is 200 ft below sea level and rises 75 ft. What is its new depth?
–125 ft
DOUBLE JEOPARDY!
Jose'annah spent 1/2 hour doing her math homework and 1/3 hours doing her science homework. How long did she spend doing her homework?
5/6 hour
–7.9 – 3.5
-11.4
Subtract: 41/2 – 21/4
21/4
Additive Inverse
The sum of a number and its opposite is zero
Evaluate: (–12) + (8) – (–5)
The 8th grade concessions made $20.75 in tips. How much does each person get if they split the tips evenly among the 5 people who worked?
$4.15
Multiply: (–0.4) × (–2.5)
1.0
Simplify: –5/8 – 3/4
–11/8 or –13/8
Rational Number
Any number that can be written as a fraction
Kai had a balance of –$18 in his lunch account. He added $12 and then was charged another $9.
What is his new balance?
-$15
The farthest measurement for the 7th grade sit and reach test was 11 inches. The lowest measurement was -5.25. How much further was the highest measurement from the lowest?
16.25 inches