Addition Properties
3 Digit Addition
4 Digit Addition
Estimating Sums
Addition Patterns
100

What property of addition is being used here?

(2+5)+8=

2+(5+8)=

Associative

100

Add. Show your work.

445+26

445+26=471

100

What place (thousands, hundreds, tens, or ones) lines up when we add 4 digit numbers vertically?

Ones place

100

Estimate. Round to the nearest ten. 

34+23

30+20=50

100

What is 10 more than 1,465?

1,475

200

What property of addition is being used here?

2+8=

8+2=

Commutative

200

Find the unknown

607+27=?

The unknown is 634

200

Add. Show your work

8,285+1,456

8285+1456=9,741

200

What key word in a word problem tells us we need to estimate a sum?

About

200

What is 100 more than 8,699?

8,799

300

What property of addition is being used here?

100+0=

Identity

300

Add. Check for reasonableness. 

597+51

597+51=648

Round to tens to estimate

600+50=650

300

Add. Check for reasonableness by rounding to the hundreds place.

5,555+3,555

5,555+3,555=9110

5,600+3,600=9,200

300

What makes an estimated sum reasonable? (2 part answer)

It makes sense. It is close to the real sum.

300
What is the next number in this pattern?


3,400; 3,500; 3,600;_____

3,700

400

What addition property can we use to compete this sentence?

6+__=6

Identity

400

Add. Show your work. Use the commutative property to check for accuracy. 

231+596

231+596=827

596+231=827

400

Add to find the unkown. 

2,865+5,522=?

2,865+5,522=8,387

400

Estimate. Round each addend to the nearest ten AND the nearest hundred. 

133+560=

130+560=690

100+600=700

400

Identify the pattern. 

4,720; 4,730; 4,740; 4,750

Add ten

500

Kelly collected 16 postcards last summer. This summer she did not collect any postcards. How many postcards did she collect all together? Which property did you use to find your answer?

16, identity

500

A 10 speed bike is on sale for $199, and a 12 speed racing bike is on sale for $458. How much do the two bikes cost all together? Show your work. 

199+458=657

500

Add. use the commutative property to check for accuracy. Show your work.

1,734+2,882

1,734+2,882=4,616

2,882+1,734=4,616

500

A high school gymnasium can seat 2,136 people. To the nearest ten and hundred, about how many people can sit in the gymnasium? Which estimate is closer? Explain.

Nearest ten = 2,140

Nearest hundred = 2,100

Tens is closer because 2,136 is closer to 2,140

500

A baby elephant weighed 264 pounds at birth. It gained 100 pounds each month. How much does the elephant weigh in 4 months?

At birth: 264 pounds

Month 1: 364

Month 2: 464

Month 3: 564

Month 4: 664

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