Add and Sub Facts

5 - (-12)

• -7

• 7

• 17

• -17

-9 + 9

• 18

• -18

• 0

• 81

-12 + 9

• 21

• 3

• -3

• -21

-5 - (-25)

• 20

• -25

• -20

• -30

-7 - (-2) = ?

• 9

• -9

• -5

• 5

What must you have to add and subtract fractions?

• Common numerators

• Different numerators

• Different denominators

• Common denominators

Tiffany bought 2/5 kg of cherries.  Linda bought 1/10kg of cherries.  How many kg of cherries did they buy altogether?  

• 1/5 kg

• 3/10 kg

• 5/15 kg

• 1/2 kg

(3x + 4y - 3z) - (2x - 6y + 7z)

• x + 10y - 10z

• -x +10y - 10z

• x -10y - 10z

• -x -10y - 10z

-2 + 13 - 8

• 3

• -23

• 17

• 23

232- (-84)

• 316

• 148

• -148

• 315