Soalan 1:
Nilaikan setiap yang berikut.
(a) 4.7 – 7.8 × 0.3
(b) (8.36 + 3.89) ÷ (–0.28)
(c) –3.48 + (7.36 + 1.24) × 0.6
(d) 0.36 – (–8.67) ÷ (– 0.3) + 0.82
(e) –2.65 – 1.44/–1.2 + 3.22
(f) 2.34 + 3.1 × (–0.1) + 0.2
Penyelesaian:
Apabila melakukan penghitungan yang melibatkan gabungan operasi ke atas integer, ikut tertib operasi yang berikut.
(a)
$$ \begin{aligned} & 4.7-7.8 \times 0.3 \longleftarrow \text { Pendaraban dilakukan dahulu. } \\ & =4.7-2.34 \\ & =2.36 \end{aligned} $$
(b)
$$ \begin{aligned} & (8.36+3.89) \div(-0.28) \\ & =12.25 \div(-0.28) \\ & =-43.75 \end{aligned} $$
(c)
$$ \begin{aligned} & -3.48+(7.36+1.24) \times 0.6 \\ & =-3.48+8.6 \times 0.6 \\ & =-3.48+5.16 \\ & =1.68 \end{aligned} $$
(d)
$$ \begin{array}{ll} 0.36-(-8.67) \div(-0.3)+0.82 \longleftarrow & \text { Pembahagian } \\ =0.36-28.9+0.82 & \text { dilakukan dahulu. } \\ =-27.72 & \end{array} $$
(e)
$$ \begin{aligned} & -2.65-\frac{1.44}{-1.2}+3.22 \longleftarrow \text { Pembahagian dilakukan dahulu. } \\ & =-2.65+1.2+3.22 \\ & =1.77 \end{aligned} $$
(f)
$$ \begin{aligned} & 2.34+3.1 \times(-0.1)+0.2 \longleftarrow \text { Pendaraban dilakukan dahulu. } \\ & =2.34-0.31+0.2 \\ & =2.23 \end{aligned} $$
Nilaikan setiap yang berikut.
(a) 4.7 – 7.8 × 0.3
(b) (8.36 + 3.89) ÷ (–0.28)
(c) –3.48 + (7.36 + 1.24) × 0.6
(d) 0.36 – (–8.67) ÷ (– 0.3) + 0.82
(e) –2.65 – 1.44/–1.2 + 3.22
(f) 2.34 + 3.1 × (–0.1) + 0.2
Penyelesaian:
Apabila melakukan penghitungan yang melibatkan gabungan operasi ke atas integer, ikut tertib operasi yang berikut.
(a)
$$ \begin{aligned} & 4.7-7.8 \times 0.3 \longleftarrow \text { Pendaraban dilakukan dahulu. } \\ & =4.7-2.34 \\ & =2.36 \end{aligned} $$
(b)
$$ \begin{aligned} & (8.36+3.89) \div(-0.28) \\ & =12.25 \div(-0.28) \\ & =-43.75 \end{aligned} $$
(c)
$$ \begin{aligned} & -3.48+(7.36+1.24) \times 0.6 \\ & =-3.48+8.6 \times 0.6 \\ & =-3.48+5.16 \\ & =1.68 \end{aligned} $$
(d)
$$ \begin{array}{ll} 0.36-(-8.67) \div(-0.3)+0.82 \longleftarrow & \text { Pembahagian } \\ =0.36-28.9+0.82 & \text { dilakukan dahulu. } \\ =-27.72 & \end{array} $$
(e)
$$ \begin{aligned} & -2.65-\frac{1.44}{-1.2}+3.22 \longleftarrow \text { Pembahagian dilakukan dahulu. } \\ & =-2.65+1.2+3.22 \\ & =1.77 \end{aligned} $$
(f)
$$ \begin{aligned} & 2.34+3.1 \times(-0.1)+0.2 \longleftarrow \text { Pendaraban dilakukan dahulu. } \\ & =2.34-0.31+0.2 \\ & =2.23 \end{aligned} $$