The ideas in this multiplication lesson are taken from Multiplication Division 2 ebook. Only a few examples of each problem type are shown; you should make more problems of each kind for the student.

Divisibility
Free lesson plan from HomeschoolMath.net

Remember?   A number is divisible by another number if when you do the division, it is exact.  In other words, there is no remainder.  You can use long division to check if there is a remainder or not.  For example,   2 8 2  5  6    -  4 1 6 -  1  6 0 2 6 3  7  8    -  6 1 8 -  1  8 0 1 6 4  6  7    -  4 2 7 -  2  4 3 56 ÷ 2 = 28. So 56 is divisible by 2. 78 ÷ 3 = 26. So 78 is divisible by 3.   67 ÷ 4 = 16, R 3. So 67 is not divisible by 4.

 
Practice

1.  Answer the questions.  Justify your answer in each case.

Is 603 divisible by 4?

Is 906 divisible by 7? No, because  906 ÷ 7 = ___ R__  (not exact division) 1 7  9  0 6

Is 666 divisible by 3?

2.  Make a list of numbers that are between 20 and 50 that are divisible by 2.  Use the multiplication table of 2 as a starting point.

3.  Study which of these numbers are divisible by 2.  Use your notebook for any long divisions you want to make.

4.  Based on your findings in the previous exercise, make a guess of the rule for divisibility by 2.  Then indicate which of the following numbers are divisible by 2.  Check with your teacher.

5.  Study which of these numbers are divisible by 5.  Use your notebook for any long divisions you want to make.

  
6.  Indicate if the following numbers are divisible by 2, 5, or 10.

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