About Miss. Helstad
Rounding
Sums
Differences
Estimation
100

This is the subject Ms. Helstad teaches your class every day.

What is Math?

100

Round 43 to the nearest ten.

What is 40?

100

220 + 130

What is 350?

100

600 − 200

What is 400?

100

Estimate: 57 + 23

What is about 80? (60 + 20)

200

This is Miss. Helstad's favorite football team.

What is the Green Bay Packers?

200

Round 78 to the nearest ten.

What is 80?

200

341 + 258

What is 599?

200

754 − 520

What is 234?

200

Estimate: 146 − 60

What is about 100? (150 − 60)

300

This is the sport Miss. Helstad played growing up.

What is cheerleading?

300

Round 256 to the nearest hundred.

What is 300?

300

286 + 197

What is 483?

300

432 − 158

What is 274?

300

Round both numbers to the nearest ten: 234 + 168

About 230 + 170 = 400

400

This is Miss. Helstad's favorite color.

What is pink?

400

Round 446 to the nearest hundred.

What is 400?

400

A class collected 368 cans on Monday and 457 cans on Tuesday.
How many cans did they collect in total?

What is 825?

400

A library has 905 books. After donating 468 books, how many remain?

What is 437?

400

Estimate the difference: 721 − 289

700 − 300 ≈ 400

500

This is the college that Miss. Helstad went to.

What is University of Illinois?

500

A number rounds to 700 when rounded to the nearest hundred. It is greater than 650. Name one possible number.

What is any number from 650–749?

500

Two numbers add to 1,000.
One number is 468.
What should the other number be?

What is 532?

500

A number minus 587 equals 326.
What is the number?

What is 913?

500

Mia wants to estimate 326 − 278.

Should Mia round both numbers to the nearest ten or to the nearest hundred? Explain your thinking.

Round to the nearest the tens

M
e
n
u