Properties of Add and Sub/Patterns
17 + (5 + 11) =
What property is this?
Associative Property
Add 223+728 mentally
591
8,346
+7,208
_______
15,554
- 5,445
__________
4,955
Cardinal stadium, in St. Louis,can seat 52,000 fans. If there are 45,787 fans attending a game. How many open seats left is there at the baseball game?
47,422
What property is this?
Commutative Property
Subtract 684 - 169 mentally
515
452,903
+318,766
_________
771,669
60,000
-21,833
______
38,199
Ms. Cassie decided to bake 1100 for grade 4A and B classes. On Saturday she baked 582 and on Sunday she baked 433. How many cookies does she still need to bake?
85 cookies
37 - 0 = 37
what property is this?
Subtraction Rules
5,258 + 3,420 round to the hundreds
5,200 + 3,400 = 8,600
-5,709
_________
2,168
700,000
- 28,005
_______
617,995
An adult elephant weighs 1,899 pounds. A new born elephant weighs 156 pounds. What is the combined weight of the mother and the newborn?
2,055
115,236; _______; 115,296; 115,326
What number goes in the blank space?
115,266
48,205 + 55,514 =
round to the thousands
48,000 + 56,000 = 104,000
629,843
- 216,954
________
412,889
508,200
- 136,118
_________
372,082
76 beads
84,552 + _______ = 99,552
Complete the number sentence.
15,000
25,497 + 54,088 =
round to the ten thousands
30,000 + 50,000 = 80,000
Find the error... Vocabulary is important to get the answer correct.
11,236
- 89,365
When subtracting, the minuend CANNOT be greater than the subtrahend
2,050,100
- 424,789
_________
1,625,311
Barry had 24 jars of almonds. He gave 8 jars to his friends to sell at a local market. Then he went the store and bought another 10 jars. His friends came back asked for more jars to sell at the market. At the end of the day, Barry only had 12 jars left. How many jars did he give to his friends the second time?
14 Jars
24 - 8 + 10 - J = 12
16 + 10 - J = 12
26 - J = 12
J = 14