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# Math Update – Week 3

September 25, 2018 by Kim Sorensen & Rebecca Farley

Last week we finished up one of our place value standards which involved writing numbers in different forms, comparing and ordering and number patterns.  We tested on these skills on Thursday and I feel that both classes did well.

This week we are multiplying with multiples!  This is a standard that if you know your math facts, is kind of a fun one!  We will talk about how when a digit moves one place to the left its value becomes 10 times greater.  We solve problems using different multiples of 10, 100, 1,000, etc.

A problem might look like:

8 x 20 = 160

8 x 2,000 = 16,000

8 x 200,000 = 1,600,000

8 x 2 = 16

8 x 200 = 1,600

We will then talk about the reverse idea.  If a digit moves one place to the right its value is divided by 10.

200,000 ÷ 4 = 50,000

200 ÷ 4 = 50

20 ÷ 4 = 5

2,000 ÷ 4 = 500

We will look at patterns to help us solve these problems.

• What happens to a digits value when it moves one place to the left?
• What happens to a digits value when it moves one place to the right?