Decimals
Change 0.35 to a whole number
Explain
Multiply by 100
= 35
Write a positive or negative number to represent each situation:
a. 3 degrees below zero =
b. 6 1/3 feet above sea level =
c. lost 5% on a quiz
d. found $4.23
a. -3
b. 6 1/3
c. -5%
d. 4.23
Find 7/8 ÷ 3/4
1 1/16
pg. 28 #3
Daniel has 20 quarts of water. How many 2 1/2 quart containers can he fill?
2 1/2 = 5/2
20 ÷ 5/2
20 x 2/5
=8
pg. 27 #5
How do I rewrite a percent as a fraction?
Rewrite the percent as a fraction with a denominator of 100. Then simplify the fraction.
pg. 37 #3
Multiply 3.8 x 6.149
23.3662
pg. 35 #2
Draw a number line to plot and label each number and its opposite.
1 1/2
-3.5
2.5
Answer drawn on board
pg. 45 #6
Find 4 3/8 ÷ 5/6
5 1/4
pg. 29 #5
Mr. Perez makes 7/8 pound of trail mix. During a hike he eats 1/2 of the trail mix. Then Mr. Perez puts the remaining trail mix into bags that each hold 2/16 pound. How many bags does he make?
3 1/2 bags
pg. 28 #7
Define the following and give an example of each:
Integers
Opposite numbers
Absolute Value
Reciprocal
Integers - a whole number NOT a fraction or decimal (ex. 6 or 150).
Opposite numbers - numbers that are the same distance from zero on the number line but in opposite directions (ex. 7.5 and 7.5 or 1/3 and -1/3)
Absolute Value - a number's distance from 0. Never negative. |2| = 2 |-3| = 3
Reciprocal - an inverse of a fraction, to find flip the numerator and denominator (ex. 3/5 = 5/3)
Find 6.825 ÷ 1.3
= 68.25 ÷ 13
= 5.25
pg.35 #1
What is the absolute value of -10
10
Find 6 2/5 ÷ 8/3
2 2/5
pg. 29 #3
A total of 6.825 inches of snow falls during a storm. The snow falls at an average rate of 1.3 inches per hour. How many hours does the snow fall?
6.825 ÷ 1.3 = 68.25 ÷ 13
= 5.25
The snow falls for 5.25 hours
pg. 35 #1
There are 20 words on a spelling quiz. Below are the quiz results for four different students:
- Darren spells 17 words correctly
- Sophia spells 3/4 of the words correctly
- Yashi spells 80% of the words correctly
- Joaquin spells 0.75 of the words correctly
Which student spells the most words correctly?
Darren
- convert each number to a percentage to compare
pg. 39 #6
Find 26.13 ÷ 4.02
6.5
pg 35 #3
a. |0| __ |-1|
b. 0 __ -1
c. 12 __ |-12|
d. -12 __ -|12|
a. |0| < |-1|
b. 0 > -1
c. 12 = |-12|
d. -12 = -|12|
Graph and label the numbers -3 1/2, 2 1/4, and 1/2 on the number line. Then graph their opposites.
Answer drawn on board.
pg. 47 #5
Gina works in a clothing store. At noon, she has $125 in the cash register. James gives her $60 for a sweater, and she gives him $7 change. Hana then gives her $40 for a blouse and receives $3 change. Use a series of addition equations to find out how much money Gina has in her cash register at the end of these sales.
$125 + $60 = $185
$185 + (-7) = $178
$178 + $40 = $218
$218 + (-3)
= $215
Answer True or False to the following:
a. -4 + (-7) = 11
b. 5 + (-4) = -5 +4
c. -10 + 7 = 7 - 10
d. 14 + (-3) = 10 +1
a. False
b. False
c. True
d. True
pg. 57 #4
If I divide 6.4 by 0.02 as
2 ÷ 64
What is my mistake?
Should multiply the dividend by 100, not 10:
2 ÷ 640
pg. 33 #5