Show:
ADDING FRACTIONS and COMPARING FRACTIONS
SUBTRACTING FRACTIONS
Equivalent Fractions and Simplest Form
LCM
Miscellaneous
100
1/4 + 1/4 =
2/4 or 1/2
100
7/8 - 1/8=
6/8 or 3/4
100
Seventy-two out of 384 5th graders like outdoor recess. What fraction of students like outdoor recess? a) 4/16 b) 2/16 c) 3/18 d) 3/16
D, 3/16
100
What is LCM of 2 and 12?
12
100
1.6 + 15.78 =
17.38
200
Which of these sums is greater than 1? a) 4/8 + 3/6= b) 2/6 + 4/8= c) 4/9 + 3/6= d) 5/10 + 7/12=
D, 5/10 + 7/12 = 13/12, which is over 12/12, which is equal to 1
200
7/9-2/3=
1/9
200
Madison bought 1 yard of bubble gum. She chewed 15 inches of it. What part of the bubble gum that she bought did she use? Remember, 1 yard is equal to 36 inches.
15/36 or 5/12 of the bubble gum
200
What LCM should you find to solve the following problem? 1/4 + 9/7? * You do not need to solve the actual problem.
28
200
4.8 x 9.66 = * Remember to round to the nearest hundredth
46.37
300
Christina mixed 6/8 a cup of red paint with 1/5 a cup of blue paint. How much paint does she have altogether?
38/40 of a cup or 19/20 of a cup
300
7 - 1/5 =
34/5 or 6 4/5
300
Which fraction is in simplest form? a) 5/10 b) 3/8 c) 13/39 d) 8/24
B, 3/8
300
Suppose you want to cut a square cake so that one person can take 1/4 of the cake and another person can take 1/5 of the cake. How many slices can you divide the cake into? Hint: There is more than one answer
20, or any other COMMON MULTIPLE of 4 and 5
300
Hector has $1,653,890.51 and Ethan has $1,999,103.84. How many times greater is the 8 in Hector's number worth more than the 8 in Ethan's number?
1,000 times greater The 8 in Hector's number is worth 800 The 8 in Ethan's number is worth 8/10, also known as .8 .8 x 1,000 = 800 You can also just move the decimal place over 3 times to the left, which is 10^3=1,000
400
Which is larger, 9/12 or 13/18
9/12
400
Amanda was making chocolate chip cookies. She used 1/2 cup fewer chocolate chips than in the recipe. If the recipe called for 8/9 cup of chocolate chips, what amount of chocolate chips did Amanda use?
7/18 cup
400
Robert said that 7/12 is in simplest form because 7 is prime and any fraction with a prime numerator is in simplest form. Is he correct? Why or why not? Explain.
Sorry Robert! He is wrong. 7/14 has a prime numerator, but it is not in simplest form because 14 is a multiple of 7. One way for a fraction to be in simplest form is if the numerator is prime and the denominator is NOT a multiple of it. A fraction is always in simplest form if the numerator and denominator do not share a common factor other than 1.
400
Marielle loves candy. 3 Musketeers come in packs of 6. Milky Ways come in packs of 5. Butterfingers come in packs of 9. What is the least number of pieces of candy Marielle can buy, so that she will have the same number of each? How many packs of each candy does that mean she will buy?
90 pieces of candy 15 packs of 3 Musketeers, 18 packs of Milky Ways, and 10 packs of Butterfingers.
400
9.32 + 7.3 x 3.09 - (2 + 3^3) =
2.877
500
3 or 19/6
19/6
500
Ellie had 6/7 of a pound of Skittles. By accident, Megan knocked into the jar and 1/3 of a pound spilled on the floor. What part of the pound of skittles is left now?
11/21
500
Jordana said that the first 5 equivalent fractions with the smallest numerators for 4/10 are: 8/20, 12/30, 16/40, 20/50, and 24/60. Is she right? Why or why not? EXPLAIN!
Sorry Jordana! She is wrong. She forgot about the equivalent that she could have found from simplifying = 2/5
500
Which of the following pairs of numbers has a least common multiple of 24? a) 2 and 12 b) 4 and 6 c) 3 and 8 d) 3 and 9
C, 3 and 8
500
4.3 x p = 24.08 * You need to figure out what p is equal to
5.6