Soalan 1:
Selesaikan setiap yang berikut:
(a) 6 + (+2)
(b) – 4 + (–3)
(c) 3 – (+2)
(d) –2 – (– 4)
(e) –8 + (–2)
(f) 6 – (+3)
(g) 9 + (+4)
(h) –5 – (–3)
Penyelesaian:
Penambahan
(i) integer positif diwakili pergerakan ke sebelah kanan
(ii) integer negatif diwakili pergerakan ke sebelah kiri
Penolakan
(i) integer positif diwakili pergerakan ke sebelah kiri
(ii) integer negatif diwakili pergerakan ke sebelah kanan
(a)
$$ \begin{aligned} & 6+(+2) \\ & =6+2 \\ & =8 \end{aligned} $$
(b)
$$ \begin{aligned} & -4+(-3) \\ & =-4-3 \\ & =-7 \end{aligned} $$
(c)
$$ \begin{aligned} & 3-(+2) \\ & =3-2 \\ & =1 \end{aligned} $$
(d)
$$ \begin{aligned} & -2-(-4) \\ & =-2+4 \\ & =2 \end{aligned} $$
(e)
$$ \begin{aligned} & -8+(-2) \\ & =-8-2 \\ & =-10 \end{aligned} $$
(f)
$$ \begin{aligned} & 6-(+3) \\ & =6-3 \\ & =3 \end{aligned} $$
(g)
$$ \begin{aligned} & 9+(+4) \\ & =9+4 \\ & =13 \end{aligned} $$
(h)
$$ \begin{aligned} & -5-(-3) \\ & =-5+3 \\ & =-2 \end{aligned} $$
Selesaikan setiap yang berikut:
(a) 6 + (+2)
(b) – 4 + (–3)
(c) 3 – (+2)
(d) –2 – (– 4)
(e) –8 + (–2)
(f) 6 – (+3)
(g) 9 + (+4)
(h) –5 – (–3)
Penyelesaian:
Penambahan
(i) integer positif diwakili pergerakan ke sebelah kanan
(ii) integer negatif diwakili pergerakan ke sebelah kiri
Penolakan
(i) integer positif diwakili pergerakan ke sebelah kiri
(ii) integer negatif diwakili pergerakan ke sebelah kanan
(a)
$$ \begin{aligned} & 6+(+2) \\ & =6+2 \\ & =8 \end{aligned} $$
(b)
$$ \begin{aligned} & -4+(-3) \\ & =-4-3 \\ & =-7 \end{aligned} $$
(c)
$$ \begin{aligned} & 3-(+2) \\ & =3-2 \\ & =1 \end{aligned} $$
(d)
$$ \begin{aligned} & -2-(-4) \\ & =-2+4 \\ & =2 \end{aligned} $$
(e)
$$ \begin{aligned} & -8+(-2) \\ & =-8-2 \\ & =-10 \end{aligned} $$
(f)
$$ \begin{aligned} & 6-(+3) \\ & =6-3 \\ & =3 \end{aligned} $$
(g)
$$ \begin{aligned} & 9+(+4) \\ & =9+4 \\ & =13 \end{aligned} $$
(h)
$$ \begin{aligned} & -5-(-3) \\ & =-5+3 \\ & =-2 \end{aligned} $$