Estimation/Rounding

Round 37.49 to the nearest tenth

• 40

• 50

• 37.5

• 37.4

Check all that are correct

• 4.9 = 4.90

• 3.77 rounds to 4

• 9.4 = 4.9

• 4.99 rounds to 4.11

What is the best estimation for 66.34 + 7.99?

• 66 + 8 = 74

• 66.340 + 10.0000000 = 9,000.0000000

• 66.3 + 7.8 = 74.10

• 70 + 7.99 = 77.99

What is a compatible number?

• A number that is hard to add or subtract.

• Round to the nearest hundredths only.

• It is not rounding or easy to work with.

• It is when you change a number to make math easier.

Estimate 547 + 294

• About 900 + 300

• About 550 + 299

• About 550 + 300

• About 500 + 900

Find compatible numbers for 547 - 294

• About 550 - 150

• About 500 - 100

• About 550 - 300

• About 600 - 294

Can numbers be added in any order?

283 + 429 = 429 + 283?

• Yes, you will get the same answer no matter what order you add them.

• No, you will not get the same answer. Smaller number on top.

• The bigger number is the one you use on top.

• No, You will not get the same answer.

Can I subtract numbers in any order?

943 - 100 = 100 - 943?

• Yes, you can subtract numbers in any order.

• No you cannot subtract numbers in any order.

• Sometimes, depends on your mood.

• You will get the same answer no matter what order you subtract numbers.

What does the word "About" mean in a word problem?

• Find the exact answer.

• Use estimation to find a number close.

• Ignore it, extra information.

Why would you need to know how to estimate or round numbers?

• You don't because it doesn't matter.

• So that you can quickly find out how much you are spending while shopping.

• So you can show the exact answer.

• Finding an estimate will only make math confusing.