8.3 Mini Lesson: Writing Equations
Presentation
•
Mathematics
•
6th - 8th Grade
•
Practice Problem
•
Medium
+3
Standards-aligned
Andrea Ortiz
Used 10+ times
FREE Resource
9 Slides • 9 Questions
1
Mini Lesson:
8.3 Writing Equations
2
Multiple Choice
DIFFERENCE refers to....
addition
subtraction
multiplication
division
3
Multiple Choice
QUOTIENT refers to....
addition
subtraction
multiplication
division
4
Multiple Choice
PRODUCT refers to....
addition
subtraction
multiplication
division
5
Multiple Choice
SUM refers to....
addition
subtraction
multiplication
division
6
Title your page as shown. Transfer Examples 1-5
into your notes.
Lesson Goal:
Translate an English sentence to a math sentence (equation)
7
continue >>>>>
In this lesson, you will need to write the " answers* " plus read the explanations!
*translations
8
_ an unknown number will be represented by a variable (I often use x or n, but any letter works!)
_ "is" means equals (eg. two plus three is five: 2 + 3 = 5)
_ "increased" implies addition
9
you already know:
_ an unknown number will be represented by a variable (I often use x or n, but any letter works!)
_ "is" means equals
10
you already know:
_ an unknown number will be represented by a variable (I often use x or n, but any letter works!)
_ "is" means equals
11
_ "twice a number" means 2 times the number!
_ "5 less than" implies that 5 is being subtracted from something ( in this case, the something is a product.) Recall: subtraction is not commutative! So 5 - 2n would be incorrect as that would represent the difference between five and twice a number INSTEAD of the difference between twice a number and five (which is what is being asked here.)
you already know:
_ an unknown number will be represented by a variable (I often use x or n, but any letter works!)
_ "is" means equals
12
you already know:
_ an unknown number will be represented by a variable (I often use x or n, but any letter works!)
_ "is" means equals
13
time to
You do not have to write the practice exercises in your notebook.
Of course, you can if you want to/ if you feel like you need more written examples.
14
Multiple Choice
fifteen more than twice a number is -23.
21n+15 = −23
2n+15=−23
2n+50=−23
2(15+n)=−23
15
Multiple Choice
eleven less than 5 times a number is 24.
21n+15 = −23
11 = 5x−24
5x−11=24
5(x−11)=24
16
Multiple Choice
twice the sum of a number and 18 is 47.
21(x+18) = 47
2(47)=x+18
2(x+18)=47
2x+18=47
17
Multiple Choice
245 is 4 more than the product of 5 and a number squared
245 = 5x2+4
245=52x+ 4
5x−11=24
245+4=52x
18
Multiple Choice
19 is the same as a number reduced by 4.5
19 = t+4.5
19 = 4.5 −t
19−t=4.5
19=t−4.5
Mini Lesson:
8.3 Writing Equations
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