Estimating and Rounding Solutions

When you see the word ABOUT in math, you know to . . . ?

• add

• subtract

• estimate

• guess

Round to the nears hundred: 493

• 593

• 500

• 400

• 490

If I have 58 gummy bears, and then I eat 20 --- ABOUT how many gummy bears do I have left?

• 38 gummy bears

• 40 gummy bears

• I don't know because I am sure you ate more than 20.

• 80 gummy bears

Darcy and Presley wanted to explain to the class why mathematicians use rounding. Choose the best explanation.

• Mathematicians use rounding to estimate what an answer should be close to before solving a problem. It is a helpful math tool!

• Mathematicians just want to make an extra step.

• Mathematicians think they are cool and mysterious. They make up weird stuff.

• Mathematicians is a hard word to spell.

What is 56 rounded to the nearest ten?

• 40

• 70

• 50

• 60

What is 104 rounded to the nearest ten?

• 90

• 95

• 110

• 100

If you have 819, you might say you have approximately...

• 900

• 880

• 820

• 810

The distance from Independence to St. Louis is 237 miles. What is the distance in miles rounded to the nearest ten?

• 230

• 200

• 240

• 300

Which of the following numbers will NOT round to 400 when rounding to the nearest hundred?

• 409

• 445

• 345

• 398

True or False. When you round to a specific place value, all of the numbers to it's right become zeros.

• True

• False