Rational Numbers & Operations
– 1/4+1/2
3/4
2/3×3/4
1/2
−7+12
5
Evaluate: 3x
x=4
12
A temperature rises from −2∘ to 6∘. What is the change?
8 degrees
−3/8+1/4
-1/8
−5/6×2/5
−6×−4
Evaluate: 2a−5
a=−3
you owe $15 and pay back $9. What is your new balance?
-6 dollars
5/6−7/12
3/12 or 1/4
7/8÷1/4
7/2 or 3/5
48÷−6
-8
Evaluate: 12b+4
b=10
9
A rope is 12.5 ft long. You cut off 3.75 ft. How much remains?
8.75 ft
−2/3−5/9
−11/9=−1 2/9
−9/10÷−3/5
3/2 or 1.5
Evaluate: −3(5−9)
12
Evaluate: −2(x−3)+5
x=−1
13
A hiker climbs 1.8 miles uphill and then descends 2.3 miles. What is the net change?
-0.5 miles
7/10−(−9/20)
23/20=1 3/20
(−49)×(15−8)
5/6
Evaluate: −18−(−25)+7
14
Evaluate: 34y−23
y=−8
−20/3
A tank holds 412 gallons. You use 34 gallon three times. How much is left
2.25 gallons