standard_description: Interpret multiplication as scaling (resizing), by:
- Explaining why multiplying a given number by a fraction greater than 1 results in a product greater than the given number (recognizing multiplication by whole numbers greater than 1 as a familiar case); explaining why multiplying a given number by a fraction less than 1 results in a product smaller than the given number; and relating the principle of fraction equivalence a/b = (n×a)/(n×b) to the effect of multiplying a/b by 1.
- Comparing the size of a product to the size of one factor on the basis of the size of the other factor, without performing the indicated multiplication.
problem_activity: Ellen and Mundi each want to write a pattern that is 10 numbers long.
Ellen writes 0 as her first number and adds 2 each time to get her next number.
Mundi writes 0 as his first number and adds 6 each time to get his next number.
Ellen’s pattern:
0
,
2
,
,
,
,
,
,
,
,
Mundi’s pattern:
0  ,
6
,
,
,
,
,
,
,
,
a.   Complete Ellen and Mundi’s patterns.
b.   How many times greater is Mundi’s fourth number than Ellen’s fourth number?  What about the seventh numbers? The tenth numbers?
c.   What pattern do you notice in Part (b)?  Why do you think that pattern exists?


aligns: no