Fractions by Whole #s
Modeling Fractions Multiplication
Word Problems
Scaling Fractions in Multiplication
REVIEW AND CHALLENGE..
100
What multiplication problem is modeled below?
1/4 x 5
100
4/5 x 2/5 =
8/25
100
1/3 of the 24-fifth grade students ride the school bus home. How many students ride the school bus?
1/3 x 24 = 24/3 = 8 students
100
Using the comparing symbols of >, <, or =.
Compare the below expression without multiplying.
½ x 7 __ ½
½ x 7 >½, because 7 > 1
100
24/6 + (9 x 3) - 6
25
200
4/6 x 3
2
200
DOUBLE
The product is 2/15. What was the expression multiplied?
2/3 x 1/5
200
1/3 of the 15 students in TUTS go home before 5pm. How many students stay after 5pm?
10 students
1/3 of 15 = 5
15 - 5 = 10
200
Using the comparing symbols of >, <, or =.
Compare the below expression without multiplying.
¾ x ⅞ ___ ¾
¾ x ⅞ < ¾, because ⅞ < 1.
200
TRIPLE JEOPARDY
3/4 x (12 + 8)
60/4 = 15
300
2/5 x 3
= 6/5 or 1 1/5
300
DOUBLE JEOPARDY
What is the area of the striped part of the rectangle? (See slide)
1/20
300
2/6 of the 54-fifth grade students go to TUTS on Friday. How many students do NOT go to TUTS?
2/6 x 54 = 108/6 = 18
54 - 18 = 36 students
300
Out of the expressions below, select TWO expressions that give you a product less than 5/6
a.) 5/6 x 2/3
b.) 5/6 x 5/6
300
A
400
True or false, the problem below equals 4 1/2?
True... 45/10 = 4 5/10 = 4 1/2
400
What is the missing # in the denominator?
The missing # is 3
400
2/3 of the marching band are brass instruments. Out of that, 1/4 are trumpet players. What fraction of the band are trumpet players?
2/3 x 1/4 = 2/12
400
Which statement is true?
a.) ½ x 2 is less than ½
b.) ¾ x ¾ is greater than ¾
c.) 1½ x 3 is less than 3
d.) 3/2 x ½ is greater than ½
d.) 3/2 x ½ is greater than ½
400
D
500
The models below show a multiplication problem. What is that expression?
1/3 x 4
500
What is the area of the striped region of the rectangle? (See Slide)
1/9 x 1/3
500
2/5 of the Fifth Grade class will be traveling outside of Florida during Winter Break. Out of that group, 1/2 will be going to Georgia. How many students will be traveling to Georgia if there are 55 students in 5th Grade?
11 students
2/5 of 55 = 22
22 ÷ 2 = 11
500
Which number can be placed in the blank to make the number sentence true?
4/3 x ___ < 4/3
a.) 6/6 because multiplying a fraction that is equal to 1 will make it equal to the other factor
b.) 3/2 because multiplying a fraction that is more than 1 will make it more than the other factor
c.) 1/2 because multiplying a fractions that is less than 1 will make it less than the other factor
d.) 1 1/2 because multiplying a fraction that is more than 1 will make it more than the other factor
c.) 1/2 because multiplying a fractions that is less than 1 will make it less than the other factor
500
DOUBLE JEOPARDY
Write the expression "half the sum of five and three, minus two".
1/2 + (5 + 3) - 2