Page 274 - KM Matematika_BS_KLS_IX

Mengulang Pelajaran SMP VII, VIII

Latihan

Bilangan dan Menyatakan Bilangan

1 Hitunglah.

(1) (–5) + (-8) (2) 7 – (–4) (3) 6 – 9 – 3

1
(4) 2 – (–4) + (-8) (5) 2 +- l (6) –1,2 – (–2,6)
b
3 4
(7) 8 × (–6) (8) 28 : (–7) (9) 4 – 8 × (–3)

(10) 3 × {2 + (-5)} +(-5) 2 (11) -54 : (-3 ) – 12
2
(12) 2 4 3 (13) " 2 - 1 - 2
3
]
4 | b
8 |
12 - ^h ] - g 3 # - g, 2 1l
3
2 Hitunglah.
(1) –8x – 2x (2) –4a + 2 + 7a - 9 (3) b 1 x + l 1 x - 1l
4 - b
6
4
(4) (–7x) × (–5) (5) 1 ] - a 6 + 9g (6) –9a : (–12)
3
(7) 5 (8) –8(4x – 3) + 3(7x – 9)
15 x |
3
3 Hitunglah.

(1) –7x + 3y + 5x – 8y (2) (x - 4x + 3) + (-2x - x + 7)
2
2
2
(3) x + 2x – 3 – (3x – x ) (4) 2(6x - y) + 5(-2x + 3y)
2
(5) 1 - b - 1 (6) x 3 - y 2 x + y 3
3
3 ^ a 2 h 5 ^ a 2 - h - 9 + 6
(7) 8a × (–3b) (8) (–14xy) : (–7y)

2
2
(9) a × 6a : 9ab (10) 3x × (–2x) : x
4 Selesaikan soal-soal berikut tentang persamaan dan proporsi.

(1) 6x = –48 (2) x – 7 = –3 (3) 5 x =-
6 10
(4) 1 – 4x = –7 (5) 5x – 17 = 8x – 5 (6) 7(x + 2) = x – 1

(7) 6x - 3(x + 5) = 6 (8) 1,8x – 2,6 = 0,6x + 1

(9) 2 x -= 5 x - 1 (10) x 2 - 5 = x 3 - 1
2
3 6 2 3 4
(11) 4 : x = 6 : 15 (12) 9 : 12 = (x – 2) : 8

(13) x 3 + 6 - 7 - x = x 4 - 1 + 5 (14) ] x + 10 | 6 - x = 7 | 3
g
5 3 6 2 3

256 Matematika untuk Sekolah Menengah Pertama Kelas IX