Addition
69 + 54 = x
x = 123
269 - 139 = x
x = 130
Which equation represents the Identify Property of Addition?
a) 78 + 0 = 78
b) 6 + 7 = 7 + 6
c) (12 + 4) + 2 = 4 + (12 + 2)
a) 78 + 0 = 78
Round 405 to the nearest hundred
400
What is a variable?
a) The first number in a subtraction sentence from which a second number is to be subtracted from.
b) A number that is subtracted from another number.
c) A sentence that contains an equals sign (=), showing that two expressions are equal
d) A symbol, usually a letter, that is used to represent an unknown quantity.
A variable is:
d) A symbol, usually a letter, that is used to represent an unknown quantity.
312 + 478 = y
y = 790
123,678 - 12,342 = y
y = 111,336
Which equation represents the Commutative Property of Addition?
a) 2 - 0 = 2
b) 3 + 4 = 4 + 3
c) (1 + 7) + 2 = 1 + (7+2)
b) 3 + 4 = 4 + 3
Round 67,890 to the nearest ten thousand
68,000
x = 29
29 + 38 = 67
257,962 + 1,000 = m
m = 258,962
35,000 - _____ = 15,000
20,000
Which equation represents the Associative Property of Addition?
a) 5 - 0 = 5
b) 3 + 0 = 3
c) 6 + (4 + 9) = 9 + (6 + 4)
d) 9 + 6 = 6 + 9
c) 6 + (4 + 9) = 9 + (6 + 4)
Round to the nearest thousand to estimate the sum of 4,576 + 2,872 & show your work
4,576 rounds to 5,000
2,872 rounds to 3,000
5,000 + 3,000 = 8,000
Find the sum between the two numbers, then use estimation to check if the answer is reasonable. You must show your work.
2,876 + 1,354 =
2,876 + 1,354 = 4,230
2,876 rounded to the nearest thousand is 3,000
1,354 rounded to the nearest thousand is 1,000
3,000 + 1,000 = 4,000
4,230 rounded to the nearest thousand is 4,000, so yes the answer is reasonable.
24,153 + 2,310 = c
c = 26,463
6000 - 1,273 = f
f = 4,727
Which equation represents subtraction rules?
a) 5 - 0 = 5
b) 37 + 0 = 37
c) 4 - 3 = 7
d) 4 + 0 = 4
a) 5 - 0 = 5
Round to the nearest hundred to estimate the difference of 3,452 - 1,231 & show your work
3,452 rounds to 3,500
1,231 rounds to 1,200
3,500 - 1,200 = 2,300
In Harry Potter and the Sorcerer's Stone, while Harry is wand shopping at Ollivanders, Mr. Ollivander tells Harry that his wand contains a phoenix feather. This phoenix dropped ONE other feather, which was used to make another character's wand. Who is the other character?
He Who Shall Not Be Named (Voldemort)
(14+6) + _____ = 94
74
250,050 - 54,967 = z
z = 195,083
Solve the equation using the Associative Property of Addition AND show your work:
45 + (20 + 8) = v
45 + (20 + 8) = v
45 + 28 = v
73 = v
Show your work!
Round to the nearest ten to estimate the sum of:
125,765 + 3,257 =
125,765 rounds to 125,770
3,257 rounds to 3,260
125,770 + 3,260 = 129,030
Steven has $86. He goes to the store and spends $3 on milk, $10 on a new shirt, and $23 on a new phone charger. On his way home, Steven finds $10 in the backseat of his car. Steven decides to stop at Sonic on his way home and buys a large Diet Coke for $2.50. How much money does Steven have left once he gets home?
Steven has $57.50 once he gets home.