Add and Subtract Signed Unlike Fractions

Start with Add and Subtract Signed Unlike Fractions, and have students show common denominators in their work. Use the two comparison sheets afterward to check number sense with signs.

Add and subtract signed fractions with unlike denominators, such as (-4/15) minus (-2/9), and simplify. The directions on the page read: Add or subtract and show your work. Write each answer in the box in simplest form. Use a mixed number when the answer is greater than 1 or less than −1. An answer key is included.

Yes, both. We made it for 7th grade rational numbers, and it works the same at home or at school. At home, a student can work through it alone and then go over it with you, which shows quickly what is solid and what needs another look. In class it works as independent practice, homework or a warm-up, and you can print one copy or a full set.

Find a common denominator, then add the numerators using the sign rules for integers. Write the answer in simplest form. Choose the Greater Sum of Signed Fractions has problems such as 2/5 + (-1/3).

Rewrite it as adding the opposite, so subtracting a negative fraction becomes adding a positive one. Choose the Greater Difference of Signed Fractions includes problems with negative fractions on both sides.

The sheets ask for a mixed number when the answer is greater than 1 or less than -1, in simplest form. Add and Subtract Signed Unlike Fractions says this in its instructions.