Number Grid
Rounding
Elapsed Time
Multiplication and Division
Pan Balance
100

How many numbers are in each row of a traditional number grid?

What is 10?

100

Round 21 to the nearest 10.

What is 20?

100

School starts at 8:00 and Mark goes to the bathroom at 8:15.  How long did Mark stay in class?

What is 15 minutes?

100

5x4

What is 20?

100

If one paper clip is 1 gram, the mass of 25 paper clips.

What is 25 grams?

200

The difference between 23 and 56.

What is 33?

200

84 rounded to the nearest 10.

What is 80

200

Ballet class starts at 3:45 and ends at 4:45.  The length of ballet class.

What is 1 hour?

200

10x10

What is 100?

200

Rob put a tennis ball on one side of the pan balance, and 2-20 gram weights on the other side of the balance.  The weight of the tennis ball.

What is 40 grams?

300

The difference between 92 and 33.

What is 59?
300

138 rounded to the nearest 10.

What is 140?

300

Bella started playing golf at 2:15 and ended at 5:30.  The elapsed time.

What is 3 hours and 15 minutes?

300
2x9

What is 18?

300

Bonnie put a highlighter which had a mass of 21 grams and an eraser that had a mass of 40 grams on one side of the pan balance.  The amount of mass of both items.

What is 61 grams?

400

How much greater is 90 than 17?

What is 73?

400

178 rounded to the nearest 100.

What is 200?

400

The sun rose at 6:37 and set at 6:40.  The amount of sunlight.

What is 12 hours and 3 minutes

400

If I have 15 cookies and want to split them equally between 3 people, the amount cookies  each person get.

What is 5?

400

Bonnie put a highlighter that had a mass of 21 grams on one side of the pan balance, and an eraser with a mass of 40 grams on the other side of the pan balance.  The amount of grams need to be added to the highlighter side of the pan balance to make them even.

What is 19 grams?

500

What is 2,392 rounded to the nearest 10.

What is 2,390?

500

If I have 100 paper clips and want to split them into 10 equal groups, the amount in each group.

What is 10?