Miscellaneous
Math Riddles
Rounding
Subtraction
100

What is the value of the digit 7 in the number 7,432?
 

What is 7,000?

100

I am a number. I’m greater than 9 but less than 11. What number am I?
 

What is 10?

100

Round 67 to the nearest ten.
 

What is 70?

100

4.5 − 2.3
 

What is 2.2?

200

What is the perimeter of a rectangle with a length of 8 units and a width of 3 units?
 

What is 22 units?

200

FREEBIE! You just earned 200 points for your team!

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200

Round 843 to the nearest hundred.

What is 800?

200

8.04 − 5.2
 

What is 2.84?

300

FREEBIE! You just earned 300 points for your team!

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300

I am a decimal number. I am greater than 4.2 but less than 4.3. I have a 7 in the hundredths place. What number could I be?
 

What is 4.27?

300

Round 12.49 to the nearest whole number.
 

What is 12?

300

10.7 − 6.85
 

What is 3.85?

400

If a pizza is cut into 8 equal slices and you eat 3, what fraction of the pizza is left?
 

What is 5/8 of the pizza is left?

400

I have 3 digits. All of them are even. The sum of the digits is 12. What number could I be?
 

What is 462? (Other valid answers: 282, 840, etc.)

400

Round 9.843 to the nearest tenth.
 

What is 9.8?

400

A watermelon weighs 15.35 pounds. After cutting, it weighs 9.8 pounds. How much weight was removed?
 

What is 5.55 pounds?

500

A train travels 60 miles in 1 hour. At that speed, how far will it travel in 3.5 hours?
 

What is 210 miles?

500

I am a number. When you multiply me by 2, then subtract 4, you get 36. What number am I?
 

What is 20? (20 × 2 = 40, 40 − 4 = 36)

500

Round 249.76 to the nearest whole number.
 

What is 250?

500

Jamie had $50.00. She bought a jacket for $23.47 and a hat for $12.58. How much money does she have left?
 

What is $13.95?

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