*If you’re working on addition without regrouping, use those number sets.*The more connections you can make between the computation and the problem-solving the better.Younger students will act out problems, draw out problems with representations, and draw out problems with circles or lines. As the numbers get larger, the model needs to represent the relationship of the numbers Here is a student moving from drawing circles to using an inverted-v.

*If you’re working on addition without regrouping, use those number sets.*The more connections you can make between the computation and the problem-solving the better.Younger students will act out problems, draw out problems with representations, and draw out problems with circles or lines. As the numbers get larger, the model needs to represent the relationship of the numbers Here is a student moving from drawing circles to using an inverted-v.

(b) Reducing : Find out how much has been given away or how much remains. (d) Inverse of addition : How much more to be added.

The key words to look out for in a problem sum involving subtraction are: 1.

It’s a shortcut that leads to breakdowns in mathematical thinking.

I talk more in depth about why it doesn’t work in The Problem with Using Keywords to Solve Word Problems.

The girls had 3 weeks to sell tickets for their play. In the second week they sold 108 tickets and in the third week they sold 210 tickets. Tickets sold in the first week = 75 Tickets sold in the second week = 108 Tickets sold in the third week = 210 Total number of tickets sold = 75 108 210 = 393 Answer: 393 tickets were sold in all.

Step 1: Money spent for petrol on Thursday 450 125 = 5 Step 2: Money spent for petrol on both days 450 575 = 25 6. 10,750 workers come in the first shift, 12,650 workers in the second shift and the rest come in the third shift.

Models are the visual ways problems are represented.

Strategies are the ways a student solves a problem, putting together and taking apart the numbers.

You can read more about the Addition & Subtraction Word Problems Resource that I use in my classroom in this blog post. Removing the distraction of the numbers helps students focus on the situation of the problem and understand the action or relationship of the numbers.

Below are five math problem-solving strategies to use when teaching word problems using any resource. It also keeps students from solving the problem before we talk about the relationship of the numbers.

## Comments Addition And Subtraction Problem Solving

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