Adding and Subtracting Rational Numbers

Bob lost 5 points on page one of his math test and he lost 9 points on page two of his math test.  Which equation best describes Bob progress on his math test?

• 5 + 9 = 14

• -5 + -9 = -4

• -5 + -9 = -14

• 5 + -9 = -4

6.59 + (−7.8) − (−2.41)

• 16.8

• 11.98

• -3.62

• 1.2

-4 + (-3) = ?

-5 + 9 = ?

8 + (-2) = ?

Bob lost 5 bonus points on page one of his math test and he gained 9 points bonus on page two of his math test. Which equation best describes Bob progress on his math test?

• 5 + 9 = 14

• -5 + 9 = 4

• -5 + (-9) = -14

• 5 + (-9) = -4

-10 + 10 =

-23.4 - 3.4= 

• -20

• 26.8

• -26.8

• 20

When adding decimals with the same sign you.....

• subtract and take the sign of the larger number

• add the opposite

• add and keep the sign

• subtract and keep the sign

Rewrite the problem as addition.

-5.66 - (-4.1)

• 5.66 + (-4.1)

• -5.66 + 4.1

• -5.66 + (-4.1)

• -5.66 - 4.1