Properties
What property is being used?
345 + 0 = 345
Identity Property
462 + 257
719
467 - 176
291
809 - 98
711
What property is being used?
4,127 + 98 = 98 + 4,127
Commutative Property (switch-a-roo)
1,237 + 321
1,558
6,435 - 2,478
3,957
1,004 - 231
773
Solve the missing number. What property is being used?
(12 + 3) + 45 = 12 + (3 + __ )
Missing number is: 45
Property used is: associative property (friendship)
What property matches this definition:
It does not matter which numbers are grouped together when adding, the sum does not change.
Associative property (friendship)
Mrs. Bradbury bought 40 pencils for her students. She gave away 24 of them. She then bought 10 more. How many pencils does she have now?
26 pencils
What property matches the definition:
It does not matter which way you add the numbers, the sum stays the same.
Commutative property
Ms. Teia stapled 200 student packets. She handed out 76 packets. She then stapled together 100 more. At the end of the day she handed out some amount of packets to her students and was left with 96 packets. How many packets did she hand out at the end of the day?
128 packets