Mastering Addition and Subtraction of Rational Numbers

When adding 3 and -5, what is the correct result?

• -2

• 2

• -8

• 8

What is the result of adding -6 and 9?

• 15

• -15

• 3

• -3

How do you handle adding -2 and -5?

• Add the numbers and change the sign

• Subtract the numbers and change the sign

• Add the numbers and keep the sign

• Subtract the numbers and keep the sign

What is the first step when adding 2/3 and -1/2?

• Subtract the fractions directly

• Find a common denominator

• Convert to decimals

• Add the fractions directly

What is the result of 2/3 + (-1/2) after finding a common denominator?

• 1/6

• -5/6

• -1/6

• 5/6

When adding -2/5 and -3/10, what is the common denominator?

• 5

• 10

• 15

• 20

What is the result of -2/5 + -3/10 after finding a common denominator?

• -1/10

• -1/2

• -5/10

• -7/10

What should you do when you see a subtraction problem with mixed numbers?

• Keep the problem as subtraction

• Convert it to multiplication

• Convert it to an addition problem

• Ignore the signs

In the problem -2 1/4 - (-1 2/6), what is the first step after converting to addition?

• Subtract the whole numbers

• Add the whole numbers

• Find a common denominator

• Convert to improper fractions

What is the final result of -2 1/4 - (-1 2/6)?

• -11/12

• 11/12

• 1/12

• -1/12