5th Grade OA Math Review (5.NF.1-2 and 5.MD.B.2)

Answer explanation

Remember to always reduce! 2/8 can be reduced to 1/4!

• 4 pounds

• 5 pounds

• 6 pounds

• 3 pounds

Answer explanation

3 and 3/5 would round up to 4 since 3/5 is greater than 1/2. 4/6 would round up to 1 since it is also greater than 1/2. 4 + 1 means a reasonable estimate would be about 5 pounds.

• 6

• 2

• 4

• 10

Answer explanation

Sure, you could use 8 with the butterfly method, but you could also find the LCM of the denominators, which would be 4! This would make both fractions 2/4, which would give a difference of 0.

• 3

• 5 cups

• 15 cups