Review of Subtraction with Mixed Numbers

What is ALWAYS the first step to solve an addition or subtraction problem with mixed numbers?

• Add the whole numbers

• Find a common denominator

• add the fractions

What do you need to do in order to subtract:

 $7\frac{3}{8}-3\frac{5}{8}$  

• Borrow or Regroup

• Just subtract them!

• Find a common denominator

True or False:

You should always add or subtract the fractions first!

• True

• False

Select the option that BEST suits you. There is no wrong answer: 

I prefer to subtract using the: 

• Borrowing/Regrouping Method

  $4\ \frac{1}{7}\ -\ 1\ \frac{3}{7}=\ 3\ \frac{8}{7}-\ 1\ \frac{3}{7}$

• Improper Fraction method

  $\frac{21}{5}-\frac{9}{5}\ =\ \frac{12}{5}=\ 2\ \frac{2}{5}$

Which expression matches the picture?

• $2-1\ \frac{3}{8}$

• $3\ \frac{4}{8}\ -\ \frac{3}{4}$

• $3\ \frac{4}{8}-\ 1\ \frac{3}{8}$

How do you write the mixed number as an improper fraction?

 $5\ \frac{2}{3}$  

•  $\frac{17}{3}$  

•  $\frac{10}{3}$  

•  $\frac{11}{3}$  

Solve:

 $6\ \frac{2}{5}-1\ \frac{4}{5}=$  

•  $5\ \frac{2}{5}$  

•  $4\ \frac{2}{5}$  

•  $4\ \frac{3}{5}$  

Which expression is the best estimate for:

 $4\ \frac{1}{8}\ -\ 2\ \frac{5}{16}$  

•  $4-3$  

•  $5-3$  

•  $4-2$