Page 240 - KM Matematika-BS-KLS-VIII

Perhitungan SMP Kelas VIII

1 Hitunglah.

1 (–8) + 10 2 (–4) + (–7) 3 5 (–3)
3 1 3 1
4 (–1,7) 0,8 5 (– ) + ( ) 6 (– ) – (– )
4 3 5 2
5 2
7 5 12 8 –4 + 9 – 1 9 – –
7 7
10 3 (–7) + (–9) 11 –5 + (–2) − 6 − (–8)

2 Hitunglah.
1 (–3) 7 2 (–5) (–9) 3 (–2) 0
–5 2 2
4 ( ) × 6 5 (–8) 6 –8
3
3
7 (–42) : (–6) 8 0 (–5) 9 (– ) : 6
5
4 2 5 1 3
10 : (– ) 11 (–12) (–4) × 5 12 : (– ) ×
9 3 8 4 10
13 8 + 24 : (–6) 14 –7 × (–8 − 1) − 30 15 48 : (–4) 2

3 Hitunglah.

1 5x + x 2 3x − 8x 3 –4a − 2 + 5a − 7
4 (x + 1) + (8x − 4) 5 (x + 1) + (8x − 4) 6 (–4) × 9x
2
7 x × 15 8 (6x + 5) − (8x − 2) 9 4(2a − 4)
3
4
10 (x − 5) × (–6) 11 (9x − 15) : 3 12 (4x – 16) :
5
1 3
13 3(2x − 3) − 5(x − 2) 14 (–x –6) + (3x – 12)
4 8

4 Hitunglah.
8
1 x − 6 = –2 2 –6x = 54 3 x = 24
3
4 9x + 5 = –4 5 –2x = –14 + 5x
6 7x − 15 = x
7 8x − 11 = 5x − 2 8 –7x − 6 = 2x + 12
9 6(x + 4) = 4(x − 3) 10 0,5x + 2 = 0,7x − 1

2 5 x + 3 4x –3
11 – x – 7 = x + 2 12 =
3 6 2 5
13 24 : 6 = 8 : x 14 2 : 5 = (x − 2) : (x + 7)

222 Matematika untuk Sekolah Menengah Pertama Kelas VIII