Properties of Addition
93 + 0 = 93
Identity Property
What does sum mean?
The total of two addends (two numbers).
374
400
374
370
Use the numbers 78 and 34 to write an equation that shows the Commutative Property.
78 + 34 = 34 + 78
17 + 14 = 14 + 17
Commutative Property
Which property states that the sum of a number plus 0 equals that same number?
Identity Property
848
800
848
850
Choose all of the equations that are true:
A. 32 + 56 + 10 = 10 + 56 = 32
B. (49 + 28) + 5 = 49 + 928 + 5)
C. 45 + 27 = 27 + 35
D. 0 + 84 = )
A. 32 + 56 + 10 = 10 + 56 = 32
B. (49 + 28) + 5 = 49 + 928 + 5)
8 + (5 + 9) = (8 + 5) + 9
Associative Property
What do you call the answer when you subtract?
Difference.
202
200
Free Space
Great Job!
Problem Solving:
Elena has $265. She buys a jacket that costs $107 and a sweater that costs $69. How much money does Elena have left?
Step 1: $107 + $69 = $176
Step 2: $265 - $176 = $89
28 + (___ + 22)= 28 + (22 + 25)
25
What do call the numbers you add to get a total?
Addends.
Write this equation and add the numbers that make it true.
(2 + 1) + 3 = 2 + (__ + __)
(2 + 1) + 3 = 2 + (1 + 3)
565
570
Remember, the 5 tells the 6 to go up!
Adrian wants to buy a tablet computer for $350 and a storage case for $62. He also wants to buy software that costs $199. How much will he spend?
350 + 62 + 199 = 611
62 + 21 + 0 = 62 + __
21
What is the inverse (opposite) operation to addition?
Subtraction.
587
600
289
290
At the school fair, Grade 3 raises $84 more than Grade 4. Grade 4 raises $112 more than Grade 2. Grade 3 raises $360. How much money does Grade 2 raise?
276- 112 = 164