Extended Facts
Estimation
Converting Liquids
Multiplication
Mistakes
100

30 x 90 = ?

What is 2,700?

100

Each kid typically uses 5 dry erase markers per year. If there are 23 kids in our class, about how many dry erase markers does Ms. Johnson need for the students?

What is 100 or 125?

100

7 Liters = ? milliliters

What is 7,000 mL?

100

17 x 5 = ?

What is 85?

100
This is how Elsa multiplied 134 x 6. What did she do wrong?

 600 + 18 + 24 = 642


She forgot the zero on 30 x 6 = 180.

200

500 x 70 = ?

What is 35,000?

200

A 2-year-old elephant could weigh 930 pounds. About how much do 7 of those elephants weigh?

What is about 6,300 pounds?

200

20,000 mL = ? Liters

What is 20 L?

200

429 x 4 = ?

What is 1,716?

200

Tigger said that 500 mL = 5 L. What did he do wrong?

He forgot that 1,000 mL = 1 L, so 500 mL would be 0.5 L.

300

400 x 50 = ?

What is 20,000?

300

A bottle of Tide has 92 ounces of laundry detergent. About how many ounces do 4 bottles have?

What is 360 ounces?

300

8.3 L = ? mL

What is 8,300 mL?

300

8 x 2,913 = ?

What is 23,304?

300

Cinderella said that 40 x 50 = 200. What did she do wrong?

She counted her zeros wrong. 4 x 5 = 20, then add 2 zeros to get 2,000.

400

2,800 / 40 = ?

Hint: 40 x ___ = 2,800

What is 70?

400

If a ChromeBook costs $370 and we have 576 kids who need ChromeBooks, about how much does that cost?

What is $240,000?

400

1,700 mL = ? L

What is 1.7 L?

400

If 328 kids get school lunch with milk every day during the school week, how many milks do we need for 1 week?

What is 1,640 milks?

400

Mulan said that 3,600 / 60 = 6. What did she do wrong?

She forgot the zero. 60 x 6 = 360, so 60 x 60 = 3,600.

500

4,000 / 50 = ?

What is 80?

500

Assume we have school 22 days per month. If we have 23 students and each kid needs a snack every day, about how many snacks does Ms. Johnson need for the month?

What is 400 or 500 snacks?

500

Ms. Johnson bought 3 liters of Dr. Pepper, 2 liters of Sprite, and 4 liters of Mountain Dew. How many milliliters of soda does she have in all?

What is 9,000 mL?

500

The cheapest ticket to this year's Super Bowl costs $6,750. If all of the 4th and 5th grade teachers want to go, how much will the tickets cost in all?

What is $54,000?

500

Charlie Brown estimated that 27 x 418 = 8,000. What did he do wrong?

He rounded 27 to 20 instead of 30. 30 x 400 = 12,000