Show:
Rounding
Addition
Subtraction
Properties of Addition
100

Round 19 to the nearest 10

20

100

Add 333 + 215

548

100

319 - 106

213

100

What property is the equation 


7 + 4 + 11 = 11 + 4 +7

Commutative Property

200

Round 189 to the nearest 100

200

200

124 + 363

487

200

937 - 322

715

200

What property is the equation

1,000,000 + 0 = 1,000,000

Identity Property

300

Round 163 to the nearest 10

160


300

713 + 119

832

300

200-133

67

300
What property is 

(8 + 4) + 3 = 8 + (4 + 3)

Associative Property

400

Round 337 to the nearest hundred

300

400

110 + 794

904

400

754-320

434

400
Fill in the blanks


8 + ___ + 4 = ___ + 9 + 4

9, 8

500

Round 455 to the nearest 10

460

500

348 + 555

903

500

235-101

134

500
Fill in the blank



0 + ___ = 27

27