5.NF.B.5. Interpret multiplication as scaling (resizing), by:

• Calculator Trouble
• Comparing a Number and a Product
• Comparing Heights of Buildings
• Fundraising
• Grass Seedlings
• Reasoning about Multiplication
• Running a Mile
• Scaling Up and Down

5.NF.B.5.a. 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.

• No tasks yet illustrate this standard.

5.NF.B.5.b. 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 $a/b = (n \times a)/(n \times b)$ to the effect of multiplying $a/b$ by $1$.

• Mrs. Gray's Homework Assignment