Subtracting Rational Numbers: Decimals

The video tutorial explains the 'same change opposite' strategy to convert subtraction expressions into equivalent addition expressions. It demonstrates this with two examples: one where both numbers are negative and another where the numbers have different signs. The tutorial concludes by summarizing the process of subtracting rational numbers in decimal form.

What is the 'same change opposite' strategy used for?

• Multiplying rational numbers

• Dividing rational numbers

• Changing addition expressions into subtraction expressions

• Converting subtraction expressions into equivalent addition expressions

When converting a subtraction expression to an addition expression, what happens to the subtraction sign?

• It changes to an addition sign

• It changes to a multiplication sign

• It changes to a division sign

• It remains the same

If two rational numbers have the same sign, what is the rule for adding them?

• Add their absolute values and change the sign

• Add their absolute values and keep the sign the same

• Subtract their absolute values and change the sign

• Subtract their absolute values and keep the sign of the larger number

In the example of subtracting -, 59 hundredths and -, 1 and five hundredths, what is the result after applying the 'same change opposite' strategy?

• Positive 46 hundredths

• Negative 1 and five hundredths

• Zero

• Negative 46 hundredths

When adding two rational numbers with different signs, what determines the sign of the result?

• The sign of the second number

• The sign of the first number

• The sign of the number with the larger absolute value

• The sign of the number with the smaller absolute value