GCF/LCM
What is the GCF of 36 and 72?
36
Estimate and solve:
452 x 24 =
Estimate to 500 x 20
Answer: 10,000
What is the same as 4 x (3 + 7)
*HINT: apply distributive property, but you don't have to solve
(4 x 3) + (4 x 7)
Solve:
74 x 20 =
1,480
Mrs. Queen made 32 brownies, and Mrs. Mode made 22 cupcakes. How many brownies and cupcakes do they have in all?
54
What is the LCM of 9 and 11?
99
Estimate and solve:
236 x 78 =
Estimate to
200 x 80 =
16,000
Solve:
(4 + 4) x 9 + 2
74
42 x 65
*Use a strategy that we learned this week.
2,730
Marcus had 76 Snickers candy bars. Devin ate 48 of them. How many Snickers did Marcus have left?
28
What is the GCF of 6 and 8?
24
Estimate and solve:(HINT: round your divisor first, and make a friendly number with the dividend)
17,425 divided by 42 =
Estimate to
16,000 divided by 40
Answer: 400
Solve:
(42 - 3) + 6 x 3
31
Solve:
523 x 33 =
*Use a strategy that we learned this week.
17,259
Natalie has 25 cookies and she wants to share them with her 4 friends. How many cookies will each person get? (HINT: 4 friends + Natalie means that 5 people will be eating the cookies).
Each person will get 5 cookies.
What is the LCF of 4 and 12?
12
Estimate and solve: (HINT: round your divisor first, and make a friendly number with your divisor)
2,398 divided by 82 =
Estimate to
2,400 divided by 80
Answer: 30
What is the same as (3 x 5) + (5 x 7)
*HINT: use the distributive property, but you don't have to solve
5 x (3 + 7)
Solve:
1634 x 15 =
*Use strategy we learned this week.
24,510
We are at school for about 7 per day, 5 days a week. About how many hours do we spend at school in a week?
35 hours per week
What is the GCF of 48 and 60?
12
Estimate and solve: (HINT: round you divisor first, and make a friendly number with your dividend)
37,989 divided by 91 =
Estimate to
36,000 divided by 90
Answer: 400
Solve:
(9 + 9) / 3 + 4 =
10
Solve:
8121 x 34 =
*Use a strategy we learned this week.
276,114
Graham works at Ingles. He works 15 hours per day. How many minutes does he work per day? (Hint: There are 60 minutes in one hour.)
900