Chapter 2 Addition

Rounding

100

Round 14 to the nearest ten

10

200

Round 87 to the nearest hundred

100

300

Round each addend then find the sum

37+16=

60

400

Round 1,456 to the nearest hundred

1,500

500

Round 6,789 to the nearest ten

6,790

3 digit addition

100

567+420

987

200

124+555

679

300

967+123

1,090

400

555+999

1,554

500

673+345

1,018

4 digit addition

100

4,400+1,000

5,400

200

3,590+2,000

5,590

300

8,967+2,385

11,352

400

7,500+3,000

10,500

500

4,356+5,233

9,589

Addition Properties

100

What property tells us when you add zero, the answer will be the same number?

Identity

200

What property is this?

8+6=14

6+8=14

Commutative

300

What property is this?

(7+1)+6=6+(1+7)

Associative

400

What is the missing number

7+1=____+7

1

500

What are the three properties of addition?

Identity, Commutative, and Associative 

Word problems

100

Jasper has 1,300 fish at his home.  He got some more and now has 2,300.  How many did he get?

1000

200

Sophia bought 560 jelly beans at the store.  When she brought them home, she only has 550.  How many did she drop?

10 Jelly Beans

300

Elizabeth made 6,570 necklaces for her friends.  Soliana gave her 10 more.  How many does she have now?

6,580 necklaces

400

Mrs. Ahn had 9,890 colored pencils.  Mr. Locke gave her some more.  How she has 9,900.  How many did he give her?

10 colored pencils

500

Ms. Donner bought 2,543 m&m's for her math class.  She gave away 100 to the students.  How many does she have now?

2,443 m&m's