3.1-3.2 add/subtract/multiply 7th

-8.52 + 7.78

• -0.74

• 0.74

• 16.3

• 16.3

-91.86 - (-14.1)

• -105.96

• 105.96

• 77.76

• -77.76

-19.2-19.2

• 0

• 38.4

• -38.4

-2.3 x 1.2

• -27.6

• 0.276

• 2.76

• -2.76

12.5 x (-1.2)

• -15

• 15

• 1.5

• -1.5

6.8 x (-3)

• -20.4

• 20.4

• 2.04

• -2.04

-18.65 - (-3.55)

• 15.1

• -15.1

• 22.2

• -22.2

-213.4 - 12.36

• -201.4

• 201.4

• -225.76

• 225.76

14.32 - 20

• -5.68

• 5.68

• 34.32

• -34.32

-100.9 + 9.9 - 9.9

• -120.7

• 120.7

• 100.9

• -100.9