Equations with Addition and Subtraction—Let's Practice
Basics on the topic Equations with Addition and Subtraction—Let's Practice
Today we are calculating equations with addition and subtraction with Razzi! This video contains examples to help you further practice and grow confident in this topic.
Transcript Equations with Addition and Subtraction—Let's Practice
Razzi says get these items ready (...) Because today we're going to practice... Equations with Addition and Subtraction. It's time to begin! Solve the following TWO STEP word problem by writing an equation. Ash has sixtythree varieties of plants in their garden. There are twentyeight varieties of tomatoes and fourteen varieties of squash. The rest of the varieties are peppers. How many different varieties of peppers are there? Pause the video to work on the problem (...) and press play when you are ready to see the solution! The equation is twentyeight plus (...) fourteen plus (...)
to represent the peppers (...) equals sixtythree. Next, add twentyeight and fourteen to get (...) fortytwo. Last, subtract fortytwo from sixtythree (...) to get twentyone. Did you also get twentyone? Let's try one more! Solve the following TWO STEP word problem by writing an equation. Samir is saving money for a new bike that costs two hundred seventynine dollars. He already has fortyfive dollars saved and is given ninetyone dollars for his birthday. How much more money does Samir need to save? Pause the video to work on the problem (...) and press play when you are ready to see the solution! The equation is fortyfive plus (...) ninetyone plus (...)
Equations with Addition and Subtraction—Let's Practice exercise

How many sunflowers are there?
HintsSet up the equation like this:
 45 + 12 + S = 83
Here is the next step of solving for S.
 45 + 12 = 57
Here is the next step of solving for S.
 57 + S = 83
Here is the next step of solving for S.
 S = 83  57
SolutionHere are the steps for solving the word problem:
 45 + 12 + S = 83
 45 + 12 = 57
 57 + S = 83
 S = 83  57
 S = 26
Marsha collected 26 sunflowers on the hike.

Penguins at the aquarium.
HintsSet up the equation like this:
 23 + 13 + P = 67
Here is the next step of solving for P.
 23 + 13 = 36
Here is the next step of solving for P.
 36 + P = 67
Here is the next step of solving for P.
 P = 67  36
SolutionHere are the steps for solving the word problem:
 23 + 13 + P = 67
 23 + 13 = 36
 36 + P = 67
 P = 67  36
 P = 31
Elijah saw 31 penguins at the aquarium.

How much money does Mohammed need for a camera?
HintsSet up the equation:
amount saved + amount given for his birthday + amount Mohammed needs to save = total cost
The first step for solving for S is to add the amount saved and the amount given for his birthday.
The next step is to subtract the sum of the amount saved and the amount given to Mohammed on his birthday from the total cost.
SolutionHere are the steps for solving the word problem:
 94 + 114 + S = 235
 93 + 114 = 208
 208 + S = 235
 S = 235  208
 S = 27
Mohammed needs to save 27 dollars.

Jamie needs to save money for drums.
HintsThe first step for solving for S is to add the amount saved and the amount given on Jamie's birthday.
The next step is to subtract the sum of the amount saved and the amount given on Jamie's birthday from the total cost.
SolutionHere are the steps for solving the word problem:
 117 + 143 + S = 321
 117 + 143 = 260
 260 + S = 321
 S = 321  260
 S = 61
Jamie needs to save 61 dollars.

Write the equation.
HintsUse S for the amount Mia needs to save.
Here is how to write the equation:
amount saved + amount given for a holiday + amount Mia needs to save = total cost
SolutionThe addends are interchangeable so any order is correct.
This is how to write the equation.
* 76 + 100 + S = 249
This is how you solve the problem:
 76 + 100 = 176
 176 + S = 249
 249  176 = 73
 S = 73

A deer ate the garden cucumbers!
HintsThe first step for solving for C is by adding the number of strawberries and tomatoes.
The second step for solving for C is to subtract the total amount from the combined amount of strawberries and tomatoes.
Once you've solved for C, subtract the amount of cucumbers eaten by the deer.
SolutionHere are the steps for solving the two part word problem:
 43 + 78 + C = 141
 43 + 78 = 121
 121 + C = 141
 C = 141  121
 C = 20
 20  16 = 4