Adding & Subtracting Rational Numbers NEXT STEPS

John is trying to find the difference of the two fractions. What is his first step?

• Subtract straight across. Answer; 4/3

• Find the LCM of 6 and 3.

• Multiply straight across. Answer; 5/18

John is trying to find the difference of the two fractions. He decides to first find the lowest common multiple of 6 and 3. Which is the LCM of 6 and 3?

• 18

• 6

• 3

• 9

John is trying to find the difference of the two fractions. He finds that the LCM of 6 and 3 is SIX. Which shows the CORRECT way to proceed?

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John is trying to find the difference of the two fractions. What is the correct answer?

• 4/3

• 3/6 or 1/2

• 4/6

• 5/18

Kate is trying to solve this problem:

-16 + 24 = ?

What strategy will help her solve this problem?

• Same sign; add & keep

• Take the sign of the larger number; then subtract

• Subtraction Means To Add The Opposite

Candice wants to solve this problem:

18 - 24 = ? . Which is the correct way to solve the problem?

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In order to solve this problem:

24.98 - (-3.44) = ?

What strategy will help her solve this problem?

• Same sign; add & keep

• Take the sign of the larger number; then subtract

• Subtraction Means To Add The Opposite

Which expression is equivalent to:

-7 - 8

• -8 + 7

• -7 + 8

• -8 - (-7)

• -7 + (-8)

• -7 - (-8)

At 2pm, the temperature was 15 degrees. By midnight, the temperature dropped by 30 degrees. What is the temperature at midnight?

• 45 degrees
• -45 degrees
• 15 degrees
• -15 degrees

-6 - 3 guided steps:

• First, find the difference of their absolute values

• First, change - to + and 3 to (-3)

• First, find the sum of their absolute values

• First, change - to + and -3 to 3