Vocabulary
The answer to a multiplication problem.
Product
2.15 × 100
215
109.4 ÷ 1,000
0.1094
Taco Supreme made $675 selling 100 tacos. How much did they make per taco?
$6.75
Multiplying or dividing by 10, 100, 1000, 10^2, 10^3 used what?
powers of 10
A number that shows part of a whole, written with a point.
decimal number
7 × 8.5
59.5
43.5 ÷ 3
14.5
Bubble’s house is 0.4 mi from school. Bonchon is 10× farther. How much farther away is Bonchon?
4 miles
Changing a number to the nearest ten, hundred, whole number, tenths, one-hundredths etc.
Rounding
A small dot that separates whole numbers from parts of numbers.
decimal point
6 × 0.04
0.24
65.2 ÷ 8
8.15
Arjun bought 10 bags of dried crickets. If each bag weighs 0.763 grams each, how many grams did he buy in total?
0.763 lbs
Which is greater: 0.25 × 4 or 1.2 ÷ 5?
0.25 × 4 = 1, bigger than 0.24
Whole numbers that are easy to calculate in your head when estimating.
compatible numbers
14.8 × 0.01
0.148
26.4 ÷ 4
6.6
William spent $64.20 on 6 video games. If all the games cost the same, what is the cost per video game?
$10.7
Kevin spent $94.80 on 6 tickets to see Huntr/x. What was the cost of one ticket?
$15.80
The number being divided in a division problem.
Dividend
0.13 × 0.74
0.0962
0.79 ÷ 0.4
1.975
Praekwan's recipe for carrot cake needs 1.75 cups sugar for one cake. How many for 4 cakes?
7 cups
Wiri bought 19.6 grams of gold leaf to give to his 4 friends. If each friend got the same amount, how much did each friend get?
4.9 grams
The result of dividing one number by another.
quotient
0.25 × 0.25
0.0625
212.8 ÷ 3.8
56
Every week Vela plays golf 0.75 hours on Monday, Wednesday, Friday. How many hours in total will she play over 4 weeks?
(0.75x3) x 4 = 9 hours
A decimal mystery: I am less than 1, greater than 0.05, and equal to 0.1 × 4. What number am I?
0.4