Adding and Subtracting Strip Diagrams

Strip diagrams

What is a strip diagram?

A strip diagram is strategy that we use to help organize and solve word problems.

Addition Stip diagram

• Know parts

• total is missing

• parts are not the same

Subtraction Strip diagram

• The total is known

• The parts are different

Multiplication strip diagrams

• Know the parts

• total is missing

• Parts are the same

Equations

• You will have problems that only have equations

• you have to pick the equation that you would use to solve the problem

• You do not have to actually solve the problem just show what you would do to solve it

• answers will look like this :2,140 + 5,627 = E

strip diagram and equation

Jayla bought 12 butterscotch candies and 8 lollipops. How many pieces of candy did she buy?

Strip diagram and equation

Students will travel in groups of 12 during the field trip to the art museum. There are 6 groups of students. How many students are at the museum?

Multi step strip diagrams

• Sometimes we will have problems that are multistep

• Still ask if you know the total?

• Look at each strip diagram in the answers

• In this problem we are taking away 12 two times from the total. So this will show up in the long bar

• Since he got three booklets with 20 in each booklet, we should see 20 on there twice

Multiple Choice

Kendra bought some muffins. They came in 6 identical boxes. Each box had 11 muffins. Which equation, when solved, will tell how many muffins Kendra bought in all?

• 66 ÷m=11
• m×6=11
• m−6=11
• m÷6=11

Multiple Choice

Which equation matches the strip diagram?

• 44 - 91 = R

• 91 - 44 = R

• 44 + 91 = R

Multiple Choice

Five students at Kaufman Elementary each collected 1,375 bottle caps.  How many bottle caps did they collect together?  Choose the equation that solves the problem.

• 1,375 - 5 = X
• 1.375 + 5 = X
• 1,375 ÷ 5 = X
• 1,375 x 5 = X