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Elementary math

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Please help with the following problems.

Category: Join (Subtypes: 1) Result Unknown, 2) Change Unknown, 3) Start Unknown):

Problems:
1) Result Unknown: Amy has 5 marbles. Then Beth gave her 8 more marbles. How many marbles does Amy have now?

2) Change Unknown: Amy had 3 marbles. How many marbles does she need to have 12 marbles altogether?

3) Start Unknown: Amy had some marbles. Beth gave her 7 more marbles. Now she has 15 marbles. How many marbles did Sally have to start with?

Questions:
1. Draw or describe representations that would assist a child in understanding the meaning of each problem

2. Discuss what strategies a student might find useful in solving the problems stated.

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Solution Summary

This solution outlines an easy way to teach elementary math dealing with 1) Result Unknown, 2) Change Unknown, 3) Start Unknown. Diagrams are included in the solution.

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See the Solution below:

Problems:

1) Amy has 5 marbles. Then Beth gave her 8 more marbles. How many marbles does Amy have now?

5 marbles + 8 marbles = 13 ...

Solution provided by:
Edwin Sinclar, MBA
Education
  • MBA, Aspen University
  • Bachelor of Science , Berea College
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