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2 Bell Ringer #4 A submarine is cruising at a depth of 30m. It climbs 12m, then dives 21m, and then climbs 13m. At what depth is the submarine? Un submarino es de crucero a una profundidad de 30 metros. Se sube a 12 metros, y luego se sumerge 21m, y luego sube 13m. ¿A qué profundidad está el submarino ?

3 2.4 Subtraction of Rational Numbers

4 Subtraction Rule Subtracting is the same as ADDING THE OPPOSITE!!! Add the numbers and keep the sign of the bigger number.

5 Subtract. -3 – 4 =

6 -8 – (-5) =

7 -4 – (-6) =

8 Subtract without a number line. 2 – 6 =

9 4 – 9 =

10 6 – (-4) =

11 - 4 – 17 =

12 - 3 – (-12) =

13 - 86 – (-400) =

14 - 4.2 – (-3.6) =

15

16

17

18 4 – 5 + (-3) + 1=

19 - 6 – (-2) – (-4) – 12 + 3 =

20 Ticket Out the Door 3 – (-7.1) + 6.3 - (-5.2)=

21 Homework Pg. 74 #’s 10 – 30 even #’s 39 - 42