Rounding
Estimation
Decimals
Addition
Subtraction
100

What is 67 rounded to the nearest ten?

What is 70?

100

Estimate the sum of 48 + 36 using rounding.

What is 90? 48 will round to 50, plus 36 will round to 40, and 50 + 40 = 90.

100

What is 0.5 written as a fraction?

What is 1/2?

100

What is 23 + 34?

What is 57?

100

What is 50 - 25?

What is 25?

200

Round 3.76 to the nearest whole number.

What is 4?

200

Estimate the product of 12 x 8 by rounding.

What is 100?

12 would round to 10 and 8 would round to 10. 10 X 10=100.

200

Convert 0.75 to a fraction.

What is 75/100 or 3/4?

200

Add 156 + 289.

What is 445?

200

Subtract 100 - 37.

What is 63?

300

What is 1,234 rounded to the nearest hundred?

What is 1,200?

300

What is the estimated difference of 150 - 68 when rounded?

What is 80? 

150-70=80

300

What is the decimal equivalent of 3/5?

What is .6?

Divide 3 by 5 or multiply the numerator and denominator by 2.

300

What is 47 + 58 + 12?

What is 117?

300

What is 200 - 75 - 25?

What is 100?

400

Round 5,678 to the nearest thousand.

What is 6,000?

400

Estimate 225 รท 5 by rounding.

What is 46?

230 divided by 5 = 46

400

 Add 1.2 + 3.45.

What is 4.65?

Make sure to align decimals.

400

Calculate 125 + 375.

What is 500?

400

Calculate 500 - 245.

What is 255?

500
  • If you have 2.489, what is it rounded to the nearest tenth?

What is 2.5?

500

If you estimate 1,256 + 789, what is your answer using rounding?

What is 2,100?

1,300+800

500

Subtract 6.78 - 2.3.

What is 4.48?

Remember to align decimals.

500

What is the sum of 1,025 + 3,456?

What is 4,481?

500

What is the result of 1,000 - 478?

What is 522?