Operasi Bentuk Aljabar Penjumlahan dan Pengurangan Sederhana, Soal dan Pembahasan serta Latihan

 

Contoh 1 :

3a + 5 + 6a + 2 = ....

Jawab :

= 3a + 6a + 5 + 2

=(3+6)a + 5 + 2

=9a+7

 

Contoh 2 :

2b - 6 – 8b +9 = ....

Jawab :

= 2b-8b-6+9

=(2-8)b + 3

=-6b+3

 

Contoh 3 :

 

2x + 5y + 6 + 5x + 2y+8 = ....

Jawab :

= 2x+5x+5y+2y+6+8

=(2+5)x + (5+2)y + 14

=7x + 7y + 14

 

Contoh 4 :
3p + 2q – 6 + 3q – 8p = ....

Jawab :

= 3p – 8p + 2q + 3q  - 6

= (3-8)p + (2+3)q – 6

= -5p + 5q – 6

 

Contoh 5 :

(5p+3)+(2p+6) = ....

Jawab :

Melepas kurung dulu

= 5p+3+2p+6

= 5p+2p+3+6

=(5+2)p + 9

=7p +9

 

Contoh 6 :

(3p-8) – (8p + 10) = ....

Jawab :

Melepas kurung

= 3p – 8 – 8 p – 10 (tanda pada +10 berubah)

= 3p – 8p – 8 – 10

= (3-8)p – 18

= -5p – 18

 

Contoh 7 :

(2a-8) – (4a-9) = ....

Jawab :

Melepas kurung

= 2a-8-4a+9 (tanda -9 berubah)

= 2a-4a – 8 +9

= (2-4)a +1

=-2a + 1

Semoga bermanfaat