Adding Rational Numbers with Different Signs

What is the first step in adding rational numbers with different signs?

• Find the absolute value of both numbers

• Start at the second number

• Start at the first number

• Subtract the smaller number from the larger number

If you earn $20 and spend $3, what is the result of adding these amounts?

• $-23

• $-17

• $17

• $23

What is the overall change in temperature if it increases by 2.5 degrees during the day and decreases by 5.5 degrees at night?

• Increased by 3 degrees

• Decreased by 3 degrees

• Increased by 8 degrees

• Decreased by 8 degrees

What is the result of adding 1 and -6.5?

• -5.5

• 5.5

• -7.5

• 7.5

If Sarah writes a check for $8.50 and then deposits $10, what is the overall change in her account balance?

• Increased by $8.50

• Decreased by $1.50

• Increased by $1.50

• No change

What does the commutative property of addition state?

• You must always add positive numbers first

• You can add numbers in any order and get the same sum

• You can only add numbers in a specific order

• You must subtract the smaller number from the larger number

What is the conjecture about adding two rational numbers with different signs?

• They will always result in a positive number

• They will always result in a negative number

• They cannot be added

• They will follow the same rules as adding two integers with different signs

What is the result of adding 2 and -7?

• 9

• -9

• -5

• 5

How can you model rational number addition using quarter coins?

• Use heads for positive and tails for negative quarters

• Use heads for negative and tails for positive quarters

• Use only tails for all quarters

• Use only heads for all quarters

What is the simplified result of adding 3/4 and -1 1/4 using quarter coins?

• -3/4

• 1/2

• -1/2

• 3/4