Upload
sathish001
View
214
Download
0
Embed Size (px)
Citation preview
8/8/2019 Whole Numbers & Equations
1/7
Grade 5
Course name: Whole numbers and Division.
Level 1.
Session 2.Equations.
Numeric expression: Is an expression with numbers.Example: 45 + 34
Numeric equation: Is a numeric expression equated to zero.Example: 45 - 45 = 0
Algebraic expression: Is an expression that contains both numeric and unknownvariables.
Example: x - 5
Algebraic equation: Is an algebraic expression equated to zero. Here you cansolve for the variable.
Example: x - 5 = 0x - 5 + 5 = 0 + 5
Therefore x = 5
The following are the points to remember while solving an algebraic equation :
1. We can add/subtract the same number to/from both sides of an equation.2. We can multiply/divide the same number to/by both sides of an equation.3. We can transfer the terms from one side to the other side after changing their
signs.
Example: 2x - 5 = 31
Step 1: Adding 5 both sides 2x - 5 + 5 = 31 + 5
Therefore, 2x = 36Step 2: Dividing both sides of the equation by 2 we get
x/2 = 36/2Therefore, x = 18
Directions: Answer the following questions.
Q 1: Is 7 a solution to the equation v + 4 = 12?
yes
no
Q 2: Rewrite 7*(a + b) using the addition and multiplication properties.
(b+a)*7
(a+b)*7
7*(b+a)
all the choices are correct
8/8/2019 Whole Numbers & Equations
2/7
Q 3: The equation c + 2 = 8 is a _____ equation.
false
true
variable
Q 4: What is a mathematical sentence with an equal sign called?
expression
equation
solution
Q 5: Identify the property used in: a + 6 = 6 + a
associative property of addition
associative property of multiplication
commutative property of addition
Q 6: Rewrite 4*3+4*7 using the distributive property.
7*(3+4)
3*(4+7)
4*(3+7)
Q 7: Identify the property used in: 1 * 6 = 6
multiplicative identityassociative property
additive property
distributive property
Q 8: What is an equation that contains one or more variables called?
open equation or variable equation
false equation
true equation
Q 9: 2 * (6 + 4) = 2 * 6 + 2 * 4
Multiplicative Identity Property
Associative Property
Commutative Property
Distributive Property
8/8/2019 Whole Numbers & Equations
3/7
Q 10: 5 * 1 = 5
Commutative Property
Distributive Property
Multiplicative Identity Property
Associative Property
Q 11: (1 * 2) * 3 = 1 * (2 * 3)
Distributive Property
Multiplicative Identity Property
Commutative Property
Associative Property
Q 12: 63 x 1 = 63
Commutative Property
Multiplicative Identity Property
Distributive Property
Associative Property
Q 13: 5 * 10 = 10 * 5
Multiplicative Identity Property
Distributive Property
Commutative Property
Associative Property
Q 14: (2 * 3) * 4 = 2 * (3 *4)
Distributive Property
Commutative Property
Associative Property
Multiplicative Identity Property
8/8/2019 Whole Numbers & Equations
4/7
Activity 1
8/8/2019 Whole Numbers & Equations
5/7
8/8/2019 Whole Numbers & Equations
6/7
8/8/2019 Whole Numbers & Equations
7/7