# Subtraction Problem Solving For Grade 3

Although the answer helps me, the teacher, understand whether or not the student understood the relationship of the numbers, I want students to be able to explain their process and understand the depth of word problems. Those two things work in tandem but are very different.

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The set contains two twelve-sided dice, one with numbers representing the hours and the other with numbers representing minutes. Each player should roll twice, then calculate the elapsed time between the two resulting dice times.

My students had been struggling with how to solve addition and subtraction word problems for what seemed like forever.

The beauty of the blank spaces is that I can put any numbers I want into the problem, to practice the strategies we have been working on in class.

At some point, we do create a list of words, but not a keyword list.

They could underline the question and they could find the numbers.

Most of the time, my students just added the two numbers together without making sense of the problem. I am a big proponent of NOT teaching keyword lists.

After students are familiar with the process, I start to give different students different numbers, based on their level of mathematical thinking.

I also change numbers throughout the year, from one-digit to two-digit numbers.

We create a list of actions or verbs and determine whether those actions are joining or separating something. Here are a few ideas: Join: put, got, picked up, bought, made Separate: ate, lost, put down, dropped, used in the problem and the result of the problem. These are all words we use when solving problems and we learn the structure of a word problem through the vocabulary and relationship of the numbers.

In fact, using the same vocabulary across problem types helps students see the relationship of the numbers at a deeper level. Students are not solving a word problem to find “the answer”. My students can still explain, after instruction, that they A couple years ago, I came across this article about the need to help students develop adequate models to understand the relationship of the numbers within the problem. I needed to make a distinction between the students use to understand the relationship of the numbers in the problem and the strategies to solve the computation in the problem.

## Comments Subtraction Problem Solving For Grade 3

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