Ordering and Comparing Various forms of Numbers, Unit Fractions, Number Representation, Decimal Values of Common Fractions Flashcards
Unit Fraction
a fraction with a numerator of 1
1/2 as a decimal
.5
1/4 as a decimal
.25
2/4 as a decimal
.5
3/4 as a decimal
.75
1/5 as a decimal
.2
2/5 as a decimal
.4
3/5 as a decimal
.6
4/5 as a decimal
.8
1/3 as a decimal
.333…
1/8 as a decimal
0.125
1/10 as a decimal
.1
2/3 as a decimal
.666…
5/8 as a decimal
.624
4/8 as a decimal
.5
3/8 as a decimal
.375
2/8 as a decimal
.25
Which of the following is a decomposition of 3/4?
A. 1/4+1/4+1/4=3/4
B. 3/4=0.75=75%
C. 1/4+3/4=4/4=1
D. 1/2<3/4
A. because decomposing a fraction means to break a fraction up into the sum of the smaller parts with the same denominator.
What tool is effective as a visual when students are first learning percents and decimals as values of of 100?
Base-10 Blocks
How do you write a number out of 100 as a fraction?
place the number over 100 and reduce
How do you convert a fraction to a decimal?
always divide the numerator (top number) by the denominator (bottom number)
How do you convert a decimal to a percent?
move the decimal point two place values to the right
What is moving the decimal point to place values to the right the same as?
multiplying by 100
How do you find the percent of a number?
change the percent to a decimal and multiply the decimal by the number
Choose a number from the list that is greater than 70% but less than 80%
0.85 65/100 1 0.75 2^2
Solution: 0.75
The correct choice should be between 0.7 and 0.8
0.85 is not between 0.7 and 0.8
65/100 = 0.65 is not between 0.7 and 0.8
1 is not between 0.7 and 0.8
0.75 is between 0.7 and 0.8
2^2 = 4 is not between 0.7 and 0.8
