Addition Properties
Which addition property states that changing the order of addends does not change the sum?
The commutative property
What equation does the number line on Slide #1 show?
33 + 25 = 58
Or, 58 - 33 = 25
What is 160 + 320?
480
What is 281 - 200?
81
Sage has 115 erasers and Georgia has 136 erasers. How many do they have altogether?
251 erasers
The Identity Property, also known as the Addition Property of Zero, means that...
The sum of any number and 0 is that number.
What equation does the number line on Slide #2 show?
245 + 38 = 283
Or, 283 - 245 = 38
What is 350 + 456?
806
What is 856 - 432?
424
Caleb called out 27 times during class. Leo called out 15 times during class. How many more times did Caleb call out than Leo?
11 more times
Identify the addition property.
(24 + 17) + 23 = 24 + (17 + 23)
The associative property
What equation does the number line on Slide #3 show?
273 - 36 = 237
What is 378 + 154?
532
What is 522 - 197?
325
On Monday, Jason wrote 108 words of his story. On Tuesday, Jason wrote 56 more words. Shane wrote 75 words on Monday and 68 words on Tuesday for his story. Who has more words in their story?
Jason has more words in his story.
Which of the following properties ALSO applies to subtraction?
1. The Identity Property
2. The Commutative Property
The Identity Property
What SUBTRACTION equation can be solved using the number line on Slide #4?
124 - 45 = 79
What is 861 + 379?
1,240
What is 1,000 - 678?
322
Lily's goal is to reach 1,000 Who Bucks! She earned 542 Who Bucks one week and then earned 397 Who Bucks the second week. How many more Who Bucks does she need to reach her goal?
61 more Who Bucks.
Which TWO addition properties are shown in the following equation:
(183 + 499) + 17 = 499 + (17 + 183)
Write an addition AND subtraction equation that the number line on Slide #5 shows.
308 + 428 = 734
734 - 308 = 428
What is 1,984 + 837?
2,821
What is 10,000 - 767?
9,233
The library has 950 books. Class 3G borrows 118 books, class 3O borrows 265 books, class 3K borrows 307 books, and 3W borrows 143 books. How many books are left in the library?
117 books are left