Adding
493+207
700
545-335
210
Give an example equation with the Identity Property
EX: 35+0=35
Round to the nearest thousand:
24,872
25,000
Johnny bought 231 red apples and 389 green apples. He ate 148 apples. Other than a stomach ache, how many apples does Johnny have?
472 apples
78+34
112
175-123
52
Give an example of the associative property.
EX: (3+5)+2=3+(5+2)
Round to the nearest 100 to solve:
384+241=
600
Jackie had 36 highlighters. She went to a sale and bout 84 more highlighters. She gave 58 away to her friends. She was given 29 more. How many highlighters does Jackie have?
91 highlighters
124,567+100=
124,667
127-58
69
Give an example of the commutative property
EX: 4+3=3+4
Round to the nearest hundred to estimate the sum:
1,245+482=
1,700
Roseanne was hanging up flyers! She started with 2,768 flyers. She hung up 793 flyers. Oh no! 928 flyers blew away! She hung up 1,000 more flyers before lunch. How many flyers does she have left?
47 flyers
4,461+2,124
6,585
77,912-1,000
76,912
What property is this?
15+0=15
Identity
Round to the nearest ten to estimate the difference:
3,242-2,567=
670
Dan was hanging drywall. He started with 3,875 screws. He bought 15,000 more. He used 7,383 screws in the bedroom. He then used 4,299 in the bathroom. How many screws does he have left to do the kitchen?
7,193 screws
112,450+53,476
165,926
7,769-3,435
4,334
What property is this?
(36+71)+94=36+(71+94)
Associative
Round to the nearest hundred to find the estimated difference:
5,647-1,984
3,700
Cady has 435 glass marbles. She has 221 plastic marbles. She gave 150 plastic marbles to her brother. How many total marbles does Cady Have?
506 marbles