Properties of Addition
You can add numbers in any order and get the same sum
What is the Communitive Property of Addition
Round 48 to the nearest ten.
50
243 + 125 = ?
368
700 – 300 = ?
400
Sam has 142 marbles. He buys 58 more. How many does he have now?
200 Marbles
You can group numbers in any way and get the same sum.
What is the Associative Property of Addition?
Estimate the sum of 64 + 27.
60 + 30 = 90
456 + 298 = ?
754
523 – 215 = ?
308
Mia read 245 pages last week and 180 this week. How many pages did she read total?
425 pages
Fill in the blank: 0 + 456 = 456 shows the __________ Property of Addition.
Identity Property
Estimate the difference: 123 – 58
120 – 60 = 60
Add using place value: 300 + 70 + 4 + 200 + 50 + 5
629
605 – 279 = ?
326
A store had 900 apples. They sold 275. How many are left?
625 apples
Which property is shown? (8 + 3) + 2 = 8 + (3 + 2)
Associative Property
Which estimate is closest to 341 + 287?
A) 500 B) 600 C) 700
B) 600
Find the missing addend: 423 + ___ = 700
277
Subtract using place value: 500 – 200 – 30 – 4
266
There are 356 boys and 289 girls in a school. How many students are there in total?
645 students
Write your own example that shows the Commutative Property.
Any correct example (e.g., 5 + 9 = 9 + 5)
Explain why rounding helps when solving problems.
It makes numbers easier to work with and gives a quick estimate.
Add three numbers: 125 + 249 + 376
750
800 – 476 = ?
324
The total length of two ropes is 850 cm. One rope is 425 cm long. How long is the other rope?
425 cm