Question

4. A. Hitunglah pengurangan2 berikut ini!
(i) (6-5) -4 dan 6-(5-4)
(ii) (-7-2) -8 dan -7 (2-8)
(iii) (7-(-2) -4 dan 7-(-2-4)
(iv) (-15-(-8) - (-12) dan -15 - [(-8)-(-12)]

B. Bila P,Q,R sembarang bilangan bulat apakah (P-Q) - R = P - (Q-R)?

C. Apakah pengurangan pada bilangan bulat bersifat asosiatif?

Answer 1

A. (i) (6-5) -4 = 1-4 = -3
6-(5-4) = 6-1 = 5
(ii) (-7-2)-8 = -9-8 = -17
-7-(2-8) = -7-(-6) = -1
(iii) (7-(-2))-4= 9-4= 5
7-(-2-4)= 7-(-6)= 13
(iv) (-15-(-8))= -15+8= -7
-15-[(-8)-(-12)]= -15- [-8+12] = -15-(-4) = -11