Arithmetic Grade Three

Lesson One hundred and five: Multiplication Patterns

Study the following number sentences. 

  10 x 6 = 60		4 x 10 = 40		2 x 100 = 200

  100 x 4 = 400		1 x 9 = 9		5 x 10 = 50
In each case we multiply either 1, 10, or 100 by a single digit. We can rephrase each of these examples like this: 

  10 x 6 = 60 		six sets of ten equals sixty

  4 x 10 = 40		four sets of ten equals forty

  2 x 100 = 200		two sets of one hundred equals two hundred

  100 x 4 = 400		four sets of one hundred equals four hundred

  1 x 9 = 1000		nine ones equals nine

  5 x 10 = 50		five sets of ten equals fifty

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