Mathematical Expressions
Find the value of the expression a + b , when a = 17
and b = 7.
24
37 + 0=37
Identity
932 + 629=
900 + 600= 1,500
337, 560 + 48, 872=
386, 432
Find the sum.
25 + 43 + 82 + 51=
201
On Thursday Carl reads 13 pages of his book. On Friday he reads p more pages. Write an expression that shows how many pages Carl reads in total.
13 + p
23 + (15 + 7)= 23 + (7 + 15)
Commutative or Associative Property
Estimate the sum.
831 + 643 + 4,567=
800 + 600 + 4,600=6,000
Find the sum.
5 , 0 8 7 , 9 9 1 + 1 2 3 , 7 0 6=
5 , 2 1 1 , 6 9 7
418 + 575 + 62 + 3
1058
What is the value of s ?
s + 15 = 15 + 3
3
( 9+ 6) + 6 = 9 + ( 6 + 6)
Associative Property
Estimate the sum by rounding the
numbers to the nearest hundred.
5 3,7 7 1
3 2 4,1 2 2
+ 4 4,8 6 2=
5 3 , 8 0 0
3 2 4 , 1 0 0
+4 4 , 9 0 0= 4 2 2 , 8 0 0
Find the sum.
1 4 , 7 1 6 +9 , 3 3 3=
2 4 , 0 4 9
12, 712 + 40, 694 + 35, 157=
88, 563
Which equation shows BOTH the
Commutative and Associative
Properties of Addition?
(15 + 7) + 2 = 15 + (7 + 2)
15 + (7 + 2) = 15 +(2 + 7)
(15 + 7) + 2 = (7 + 2) + 15
(15 + 7) + 2 = 15 + 7 + 2
(15 + 7) + 2 = (7 + 2) + 15
The equation 63 + 0 = 63 shows which property
of addition?
Identity Property
Which expression shows an
estimate of 595,014 + 891,643 by
rounding to the nearest ten
thousand?
• 600,000 + 890,000
• 590,000 + 890,000
• 595,000 + 892,000
• 600,014 + 890,643
600,000 + 890,000
Find the sum.
4 9 1 , 0 2 7 , 9 5 6 +3 2 , 8 8 5 , 4 1 7=
5 2 3 , 9 1 3 , 3 7 3
Find the sum.
3,748 + 4,915 + 852 + 729=
10,244
Jeremy has a model car collection. There are 34 brightly colored cars, and the rest are black. Which expressions show how many model cars Jeremy has? Select all that apply.
• b + 34
• b - 34
• 34 + b
• 34 - b
b + 34 and 34 + b
Which property of addition is shown in the equation?
3 + 15 = 15 + 3
Commutative Property
Fluffy the cat will get his own TV show if his online videos get more than 10 million views. Last year his videos got 4,671,065 views, and this year his videos got 5,904,214 views.
Estimate the total number of views by rounding to the nearest hundred thousand.
4 , 7 0 0 , 0 0 0 +5 , 9 0 0 , 0 0 0 =
1 0 , 6 0 0 , 0 0 0
A grocery store sold $125,372 of groceries in July and
$137,972 of groceries in August. What is the total
amount of groceries sold in July and August?
$263,344 worth of groceries were sold.
Find the sum.
$7,241 + $1,324,885 + $132,900=
$1,465,026