Add and Subtract Rational Numbers in Three Forms

Use Add and Subtract Rational Numbers in Three Forms after students have practiced fractions and decimals separately. Assign Additive Inverses That Make Zero for the concept and the profit and loss sheet to apply it.

Convert fractions, decimals and integers to one form and add or subtract them, writing answers as decimals. The directions on the page read: Find each value. Change the numbers to the same form if you need to, show your work, and write the answer as a decimal. 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.

Change both numbers to the same form, usually decimals, then add using the sign rules. Add and Subtract Rational Numbers in Three Forms has students write each answer as a decimal.

The additive inverse of a number has the same size and the opposite sign, so the two numbers add to 0. The inverse of -14.9 is 14.9. Additive Inverses That Make Zero practices this with decimals, fractions and mixed numbers.

Use a negative number for money paid out or a loss and a positive number for money earned. Profit and Loss With Rational Numbers asks students to write an expression for each snack stand problem and find the profit or loss.