Question

Explain how estimation could be used to make sure the answer is reasonable.



Gord mixed 2.45 L of orange juice with 3.65 L of pineapple juice. His friends drank 4.85 L of the juice mixture.



How much juice was left over?

Answer 1

A.

Answer: The amount left over was 1.25 L.

Estimation: 2.45 + 3.65 is about 6.

6 L – 5 L = 1 L

There was a bit more than 1 L left over.








B.

Answer: The amount left over was 2.75 L.

Estimation: 2.45 + 3.65 is about 7.

7 L – 5 L = 2 L

There was a bit more than 2 L left over.








C.

Answer: The amount left over was 10.95 L.

Estimation: 2.45 + 3.65 is about 6 L.

6 L + 5 L = 11 L

There was a bit less than 11 L left over.

Answer 2

2.45+3.65

Answer 3

6.1

Answer 4

which is about what?

Answer 5

would you round up or down?

Answer 6

down, 6

Answer 7

yep

Answer 8

would you round up or down 4.85?

Answer 9

be right back

Answer 10

yes, to 5

Answer 11

ok, so what would be the answer?

Answer 12

b?

Answer 13

If you start with 6 and take away 5, how many do you have left?

Answer 14

1

Answer 15

so, A?

Answer 16

that's right, good job!

Answer 17

Thank you for the help @10115658

Answer 18

no problem