Chapter 2: Addition

Addition Property

100

Which addition property is this equation:

55+0=

Identity

200

Which addition property is this equation:

3+(2+4)=

(3+2)+4=

Associative 

300

Which addition property is this:

3+9=

9+3=

Commutative 

400

Give me an example of an identity addition problem....

answers will vary

500

give me an example of a commutative addition property....

answers will vary

Round and Add

100

ROUND to the nearest 100 and then add...

321+403

300+400=700

200

Round to the nearest HUNDRED and then add...

657 + 778 =

700+800=1,500

300

round to the nearest TEN and then add:

32 + 34 =

30+30=60

400

Round to the nearest TEN and then add...

78 + 89 =

80+90=170

500

Round to the nearest TEN and then add..

315 + 203 = 

320+200=520

Find the Sum

100

56+98=

154

200

$362+$428=

$790

300

108+156=

264

400

1,233 + 276 =

1,509

500

1,567 + 2,821

4,388

Add Mentally

100

77+7=

84

200

10+66=

76

300

42+29=

71

400

560+30=

590

500

451+230=

681

Word Problems

100

Kynidee brought three pencils to school. Jolee brought 7. How many pencils do they have altogether? 

3+7=10 pencils

200

Skyler made 17 paper airplanes. Kyson made twelve. How many did they make in all?

17+12=29 airplanes

300

Jackson has 11 crayons. Jaylnn gave him 18 more. How many does he have now?

11+18= 29 crayons

400

Cassidy baked 4 cupcakes. Chloe baked 3 brownies. Kayden baked 12 sugar cookies. How items do they have?

4+3+12=19 items

500

Nathan caught 16 fish! Axton caugh 12! Bella caught 9! How many fish were caught in all?

16+12+9= 37 fish