Properties of Addition
Name the property
6 + 0 = 6
Zero Property of Addition
What is 1 more than 75?
76
What is another term for doing math in your head?
mental math
Estimate by rounding to the nearest 10.
75 + 12
90
80 + 10 = 90
92 + 64
156
Name the property
8 + 7 = 7 + 8
Order Property of Addition
2,343; 3,343; 4,343; 5,343......
What is the pattern?
Adding (or plus/increase by) 1,000
What is the word which means to figure a close answer?
estimate
Round to the nearest hundred.
634 + 788
1,400
600 + 800 = 1,400
387 + 251
638
Name the property
(7 + 6) + 5 = 7 + (6 + 5)
Grouping Property of Addition
495, 505, 515, ___, ___, 545
Name the missing numbers.
What is the pattern?
525, 535
Adding (or plus/increase by) 10
What is a number close to its actual value?
an estimate
Estimate by rounding to the nearest hundred.
305 + 853
1,200
300 + 900 = 1,200
834 + 486
1,320
Which property says that you can change the order of the addends and still get the same sum?
Order Property of Addition
100 more than 723
823
What is a set of related addition and subtraction facts?
fact family
Estimate by rounding to the nearest hundred.
578 + 409
1,000
600 + 400 = 1,000
6,345 + 2,946
9,291
Which property says that the grouping of the addends does not change the sum?
Grouping Property of Addition
1,000 more than 9,876
10,876
What is a number sentence with an equals sign?
equation
Estimate by rounding to the nearest thousand.
2,356 + 4,810
7,000
2,000 + 5,000 = 7,000
7,895 + 3,647
11,542