Decimal Detectives
What is 4.6 + 2.3?
6.9
What is 1/2 + 1/4?
3/4
Is −7 positive or negative?
negative
What is the absolute value of −6?
6
In which quadrant is the point (3, 4)?
Q1
What is 9.75 − 3.4?
6.35
What is 3/4 × 2/3?
1/2
What is the opposite of 12?
-12
Which has the greater absolute value: −9 or 5?
-9
In which quadrant is the point (−5, 2)?
Q2
What is 2.6 × 1.5?
3.9
What is 5/6 ÷ 1/3?
2 1/2
Which number is greater: −3 or −8?
-3
Put these numbers in order from least to greatest: −4, 2, −1, 5
−4, −1, 2, 5
What are the coordinates of a point that is 4 units right and 3 units down from the origin?
(4,-3)
What is 8.64 ÷ 1.2?
7.2
What is 1 1/2 × 2 2/3?
4
The temperature is 4°F below zero. Write this temperature as an integer.
−4°F
Which is greater: −2.5 or −2.05?
-2.05
What is the distance between (−2, 5) and (−2, −1)?
6 units
A student buys 3 notebooks for $2.75 each and pays with $10.00. How much change should they receive?
$1.75
For the $500 calculation:
$2.75 × 3 = $8.25, then $10.00 − $8.25 = $1.75.
A recipe uses 3/4 cup of sugar per batch. If you make 2 1/2 batches, how much sugar do you need?
1 7/8 cups
A submarine is at −125 feet. It rises 40 feet. What is its new position?
-85ft
For the $500 calculation:
-125 + 40 = -85
A number is 7 units away from 0 on the number line. What are the two possible numbers?
−7 and 7
A rectangle has vertices at (1, 2), (1, 6), (7, 2), and (7, 6). What is the area of the rectangle?
24 square units
the width is 6 units and the height is 4 units, so
6 x 4 = 24