Everyday Math Grade 4 – Lesson 3.10 Open Sentences Copyright © 2010 Kelly Mo
Dec 23, 2015
Everyday MathGrade 4 – Lesson 3.10
Open Sentences
Copyright © 2010 Kelly Mott
Copyright © 2010 Kelly Mott
Math Boxes Lesson 3.10
Page 72
Copyright © 2010 Kelly Mott
Math Box 1:
Copyright © 2010 Kelly Mott
Math Box 2:
Copyright © 2010 Kelly Mott
Math Box 3:
Copyright © 2010 Kelly Mott
Math Box 4:
Copyright © 2010 Kelly Mott
Math Box 5:
Copyright © 2010 Kelly Mott
Math Box 6
Everyday MathGrade 4 – Lesson 3.10
Open Sentences
Copyright © 2010 Kelly Mott
PART 1: REVIEW
Copyright © 2010 Kelly Mott
A number sentence is a short way of writing a mathematical expression.
EXAMPLEI could write:eight plus six equals fourteenor I could write it this way:8 + 6 = 14
Number Sentences
Copyright © 2010 Kelly Mott
A number sentence can be TRUE.
EXAMPLE5 x 2 = 10
Number Sentences
Copyright © 2010 Kelly Mott
A number sentence can be FALSE.
EXAMPLE6 - 2 = 6
Number Sentences
Copyright © 2010 Kelly Mott
25 + 3 = 29
Circle:True or False
Is it TRUE or FALSE?
Copyright © 2010 Kelly Mott
55 - 3 > 51
Circle:True or False
Some number sentences use PARENTHESES.
EXAMPLE(6 – 2) + 4 = 8
Number Sentences
Copyright © 2010 Kelly Mott
To solve these, you must do what’s in the PARENTHESES first.
(6 – 2) + 4 = 8
Number Sentences
Copyright © 2010 Kelly Mott
A. (16 - 6) x 2 = ______________
B. 16 - (6 x 2) = ______________
Number Sentences
Copyright © 2010 Kelly Mott
C. (8 + 2) x 5 = ______________
D. 8 + (2 x 5) = ______________
Number Sentences
Copyright © 2010 Kelly Mott
Sometimes you have to tell if a number sentence is TRUE or FALSE.
Number Sentences
Copyright © 2010 Kelly Mott
A. (2 x 5) + 10 = 25 True or False
B. 10 = 4 + (3 x 2) True or False
Number Sentences
Copyright © 2010 Kelly Mott
Sometimes you have to add PARENTHESES to make a number sentence true.
EXAMPLE 16 - 2 x 4 = 8
Number Sentences
Copyright © 2010 Kelly Mott
16 - 2 x 4 = 8
MAKE THE SENTENCE TRUE
Copyright © 2010 Kelly Mott
CHECK LIST:
___ Circle the relationship symbol (= < >)
___ Start with the side that has numbers and operations.
___ Try parentheses around the first set of numbers and operation.
___ Do the math.
___ See if it’s true.
___ If not true, put parentheses around the next set of numbers and try again.
5 x 7 - 5 = 30
MAKE THE SENTENCE TRUE
Copyright © 2010 Kelly Mott
CHECK LIST:
___ Circle the relationship symbol (= < >)
___ Start with the side that has numbers and operations.
___ Try parentheses around the first set of numbers and operation.
___ Do the math.
___ See if it’s true.
___ If not true, put parentheses around the next set of numbers and try again.
8 x 2 + 1 = 24
MAKE THE SENTENCE TRUE
Copyright © 2010 Kelly Mott
CHECK LIST:
___ Circle the relationship symbol (= < >)
___ Start with the side that has numbers and operations.
___ Try parentheses around the first set of numbers and operation.
___ Do the math.
___ See if it’s true.
___ If not true, put parentheses around the next set of numbers and try again.
12 ÷ 4 x 3 = 9
MAKE THE SENTENCE TRUE
Copyright © 2010 Kelly Mott
CHECK LIST:
___ Circle the relationship symbol (= < >)
___ Start with the side that has numbers and operations.
___ Try parentheses around the first set of numbers and operation.
___ Do the math.
___ See if it’s true.
___ If not true, put parentheses around the next set of numbers and try again.
PART 2: OPEN SENTENCES
Copyright © 2010 Kelly Mott
A number sentence is open if it has a VARIABLE.
EXAMPLE12 + x = 15
Number Sentences
Copyright © 2010 Kelly Mott
A VARIABLE is a letter or symbol that stands for a missing number.12 + x = 15
Number Sentences
Copyright © 2010 Kelly Mott
To solve sentences with variables, oftentimes you will use the INVERSE operation.
Number Sentences
Copyright © 2010 Kelly Mott
51 = n + 29
n = _______
Open Number Sentences
Copyright © 2010 Kelly Mott
12 + b = 55
b = ________
33 = s + 24
s = _______
Open Number Sentences
Copyright © 2010 Kelly Mott
67 + y = 102
y = ________
17 = z - 8
z = _______
Open Number Sentences
Copyright © 2010 Kelly Mott
t - 9 = 14
t = ________
41 = k - 18
k = _______
Open Number Sentences
Copyright © 2010 Kelly Mott
f - 7 = 23
f = ________
18 = 2 * x
x = _______
Open Number Sentences
Copyright © 2010 Kelly Mott
4 * w = 24
w =________
18 = 2 * x
x = _______
Open Number Sentences
Copyright © 2010 Kelly Mott
4 * w = 24
w =________
77 = 7 * y
y = _______
Open Number Sentences
Copyright © 2010 Kelly Mott
5 * h = 60
h =________
7 = 21/x
x = _______
Open Number Sentences
Copyright © 2010 Kelly Mott
18/w= 9
w =________
6 = 24/s
s = _______
Open Number Sentences
Copyright © 2010 Kelly Mott
36/f= 12
f =________
x = 7 * 3
x = _______
Open Number Sentences
Copyright © 2010 Kelly Mott
8 * 8 = z
z =________
y = 21/3
y = _______
Open Number Sentences
Copyright © 2010 Kelly Mott
14/2= t
t =________
Does this make sense?
Copyright © 2010 Kelly Mott
a
Copyright © 2010 Kelly Mott
Copyright © 2010 Kelly Mott
HOMEWORKPage 71
Copyright © 2010 Kelly Mott