การบวกจำนวนเต็ม

(-12) + (-10)

• 2

• -22

• -2

• 10

15 + (-3) + 12 =

-100 + 25 + (-225) =

15 + (-3) =

-39 + (-100) =

45+(-3)

15 + (-6) = ?

• -21

• -9

• 9

• 21

-30+25

• -5

• 5

• 10

• -10

(-19) + [20 + (-7)] = ?

• -5

• -6

• -7

• -8

[(-10) + 3] + (-2) = ?

• 9

• -9

• -15

• 15