Rules for Writing Equations
You are given words like "sum, more than, added to, together, and increased by"
What operation do these words ask you to do: addition, subtraction, multiplication, or division
Addition!
Is f=8 a solution to the equation f+15=23. Show your steps for full points!
Is j=5 a solution to the equation 7j=42? Show your steps for full points!
No, j=5 is not a solution
9 times a number b is 36
9b=36
or
9 x b = 36
Seven and k together equal 19
7+12=19
What operation do words like "difference, decreased by, reduce, take away, or reduce" ask you to do--addition, subtraction, multiplication, or division?
Is p=14 a solution to the equation p - 7 = 5? Show your steps for full points
No, 14 is not a solution!
8g = 120
g = 15
The sum of a number x and 4 equals 12
x+4=12
or
4+x=12
5 increased by 6 then all multiplied by 2 equals 12.
HINT: According to PEMDAS, what do you need to add to make sure that addition can happen before multiplication?
(5+6) x 2 = 22
What operation do words like "quotient, half, divisor, dividend, share equally" ask you to do--addition, subtraction, multiplication, or division?
Division!
Solve for r. Show your steps to receive full points!
r + 17 = 29
r = 12
Solve for s. Show steps for full points!
s/10=7
s=70
The quotient of w and 5 is 6
w/5= 6
Write the expression: The difference of 24 and p, then divided by 2
(24 - p)/2
When given a subtraction or division problem, such as 15 less than c equals 12 or half of q is 8, the order of numbers does not affect your answer.
False! Order is very important in subtraction problems.
Solve for y
y - 9 = 29
y = 38
Solve for p. Show all steps for full points!
5p/6=20
p=24
16j=64
Jason wants to walk 100 miles this month. He has already walked 27 miles. How many more miles, m, does Jason need to walk to reach his goal?
1) Write an equation
2) Solve for m
27 + m = 100
m= 73
True or False: When given an all addition problem or all multiplication problem (ex: 4 more than g is 12 or the product of 5 and u equals 60), the order of addition or multiplication will not effect your answer.
True!
Because of the commutative property, you can do the addition in whichever order you prefer: eg: 4 + g or g + 4
You can also do an all multiplication problem in whichever order you wish-- 5 times u is the same thing as u times 5
Solve for d. Show your steps for full points!
d - 10.5 = 11.2
d = 21.7
Solve for d. Show all steps for full points!
5d/9=10
d=18
The difference of 12 and z is 3
12 - z = 3
1) Write an equation to represent the number of months that have passed
2) Find how many months it would take for Sally to watch 100 movies
m = 20