Unit 2 Lesson 8 in Math

Presentation

•

Mathematics

•

3rd Grade

•

Hard

Joseph Anderson

FREE Resource

6 Slides • 10 Questions

Unit 8 Math Review - Part 2

Rounding

You can round to subtract ... 45 - 12 is the same as 50 - 10 = 40
Think about what the number is close to ... 684 is closer to 700 than 600

Multiple Choice

Estimate to the nearest 10 - 641 - 212

640 - 220 = 220

640 - 210 = 430

650 - 220 = 430

650 - 210 = 440

Multiple Choice

Estimate to the nearest 10: 874 - 526

880 - 520 = 360

880 - 530 = 350

870 - 520 = 350

870 - 530 = 340

Open Ended

Estimate to the nearest 10: 847 - 615

Type response here

Rounding with multiple steps

Sometimes you have to ADD and SUBTRACT while working out the problem

Multiple Choice

Jen has $500. She bought soap for $125 and a book for $213. How much money does Jen have left?

200

300

100

400

Multiple Choice

Jen has $700. She bought soap for $195 and a book for $193. How much money does Jen have left?

100

300

400

Addition Table

You can use the addition table to figure out the properties of addition

Multiple Choice

Look at the highlights, what property can you see?

Associative Property because 0 + 5 = 5

Commutative Property because 0 + 5 = 5

The Identity Property because 0 + 5 = 5

Multiple Choice

Look at the table, what property do you see?

Identify Property because 6 + 3 = 3 + 6

Associate Property because 6 + 3 = 3 + 6

Commutative Property because 6 + 3 = 3 + 6

Rounding multiple numbers

Sometimes you will have to round 3-4 numbers and add them up. This can be challenging. Let's practice

Multiple Choice

Round these numbers to the nearest 10 and add:

178 + 202 + 154 + 103

380

540

630

480

Multiple Choice

Round these numbers to the nearest 10:

108 + 159 + 188 + 204

660

470

570

310

Are there any questions?

Please meet me in performance matters to finish up our assessment! You CAN do this :)

Multiple Choice

Estimate to the nearest 10 - 641 - 212

640 - 220 = 220

640 - 210 = 430

650 - 220 = 430

650 - 210 = 440

Unit 8 Math Review - Part 2

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