+- X / Fractions
Add/Subtract with Like denominators : Denominators stay the same
Add/Subtract with Unlike denominators :
Use number machine
Add and Subtract with Mixed Numbers
Use number machineLeave mixed numbers alone—don’t spin!
What if you have to borrow?
Use number machine for fractions
Take denominator and add to numerator to borrow.Don’t spin!
Multiplying with like denominators
Multiply straight across (can look for cross relations)
Multiply with Mixed Numbers
Doesn’t matter if different denominators
Spin mixed numbers
Place horizontally and look for criss-cross relations
Then multiply straight across
Fix improper fraction answers
Divide Like and Unlike Denominators
Bizarro World
Division sign turns to X
Invert 2nd fraction
Look for criss-cross relations
Then multiply straight across
Divide Mixed Numbers
Spin
Change to X
Invert 2nd fraction
Criss-cross relations
Multiply straight across