Adding and Subtracting Rational Numbers Explained

What is the first step when you see a subtraction expression involving decimals?

• Convert it to division

• Convert it to addition

• Convert it to multiplication

• Leave it as it is

When adding decimals, what should you ensure about the decimal points?

• They are aligned

• They are removed

• They are converted to fractions

• They are ignored

What is the result of 12.38 minus negative 7.59?

• 20.97

• 5.79

• 19.97

• 4.79

When adding numbers with different signs, what should you do?

• Find the difference

• Multiply the numbers

• Divide the numbers

• Add the numbers directly

What is the result of 7.84 plus negative 9.7?

• -17.54

• 1.86

• 17.54

• -1.86

What is the first step when adding or subtracting fractions?

• Divide the fractions

• Find a common denominator

• Convert to decimals

• Multiply the fractions

What is the least common multiple of 5 and 3?

• 10

• 8

• 15

• 20

What is the result of negative four-fifths minus two-thirds?

• -2 8/15

• -2 7/15

• -1 7/15

• -1 8/15

What is the common denominator for the fractions negative two-ninths and two-thirds?

• 3

• 6

• 12

• 9

What is the result of negative two-ninths plus two-thirds?

• 8/9

• 6/9

• 2/9

• 4/9