## Math Expressions Common Core Grade 3 Unit 4 Lesson 8 Answer Key Discuss Addition Methods

**Math Expressions Grade 3 Unit 4 Lesson 8 Homework**

**Solve each problem using a numerical method and a proof drawing.**

Question 1.

Delia guessed that there were 534 beans in a jar. When the contest ended, the beans were counted. There were 252 more beans than Delia guessed. How many beans were in the jar?

Answer: 786

Explanation:

Guessed beans in the jar is 534

When counted it was more 252

Total beans in jar = 786

Question 2.

Sal’s Sandwich Shop sold 324 sandwiches last week. This week they sold 579 more sandwiches than they sold last week. How many sandwiches did the shop sell this week?

Answer: 903

Explanation:

Sandwich sold in last week is 324

More sandwich sold than last week is 579

Total sandwich sold is 903

Question 3.

An on-line music store sold 438 CDs on Monday and 325 CDs on Tuesday. How many CDs did the store sell on those two days?

Answer: 763

Explanation:

On monday cd’s sold is 438

On tuesday cd’s sold is 325

Total is 763

**Write each addition vertically. Line up the places correctly and add. Make a proof drawing to show your answer is correct.**

Question 4.

657 + 69 = _____

Answer: 726

Question 5.

459 + 265 = _____

Answer: 724

Question 6.

256 + 99 = _____

Answer: 355

**Math Expressions Grade 3 Unit 4 Lesson 8** **Remembering**

**Solve. Use drawings if you need to.**

Question 1.

The adults on Team A pour 4 liters of water into a bucket. The students on Team A pour 5 liters of water into the bucket. How many liters of water did Team A pour into the bucket?

Answer:

The adults on Team A pour 4 liters

students on Team A pour 5

The number of liters of water did Team A pour into the bucket is 9

Question 2.

The florist has a bud vase that contains 950 milliliters of water. She pours out 320 milliliters of the water. How much water is left in the vase?

Answer:

Total waste of bud waste water is 950

She pours out 320 milliliters

The remaining is 630 milliliters

**Solve using a numerical method and a proof drawing.**

Question 3.

Jared and Rachel are playing a video game. Jared has 463 points. Rachel has 329 points. How many points do they have altogether?

Answer:

Jared has 463

Rachel has 329

Altogether is 792

463 + 329 = 792

Question 4.

525 + 346 = _____

Answer:

Adding of 525 + 346 is 871

Question 5.

**Stretch Your Thinking** Write a word problem that would have a proof drawing with no new tens and no new hundreds. Explain how you chose your numbers. Solve using a numerical method and proof drawing.

Answer: