Soal dan Jawaban Penjumlahan dan Pengurangan Bilangan Bulat

KOMPAS.com – Bilangan bulat positif dan negatif dapat saling ditambahkan dan dikurangi. Berikut adalah contoh soal penjumlahan dan pengurangan bilangan bulat positif dan negatif beserta jawabannya!

Contoh soal 1

Hitunglah!

1. (+5) + (-18) + (-5)
2. (-9) – (-8) + (-4)
3. 2 – 7
4. -4 – 5
5. -2 + 10 – 5
6. 3 – 7 – 4 + 8
7. 16 – (+17) – 13
8. (-3) + 6 + (-7) – (-9)

Jawaban:

1. (+5) + (-18) + (-5) = -13 + (-5) = -18
2. (-9) – (-8) + (-4) = -1 + (-4) -5
3. 2 – 7 = -5
4. -4 – 5 = -9
5. -2 + 10 – 5 = 8 – 5 = 3
6. 3 – 7 – 4 + 8 = -4 – 4 + 8 = -8 + 8 = 0
7. 16 – (+17) – 13 = -1 – 13 = -14
8. (-3) + 6 + (-7) – (-9) = 3 + (-7) – (-9) = - 4 – (-9) = -4 + 9 = 5

Baca juga: Operasi Penambahan Bilangan Bulat

Contoh soal 2

Ubahlah pernyataan-pernyataan berikut ini menjadi kalimat penjumlahan saja. Sebutkan suku-suku positif dan negatifnya!

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

Jawaban:

1. (+4) – (-3) = 4 + 3
   Suku positif = +4, suku negatif = -3.
2. (+7) – (+2) = 7 + (-2)
   Suku positif = +7, suku negatif = -2.
3. (-9) + (-4) – (-6) = (-9) + (-4) + 6
   Suku positif = +6, suku negatif = -9 dan -4.
4. (-5) – (-3) – (-8) = (-5) + 3 + 8
   Suku positif = 3 dan 8, suku negatif = -5.

Baca juga: Operasi Hitung Bilangan Bulat dan Pecahan

Contoh soal 3

Hitunglah!

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

Jawaban:

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

Contoh soal 4

Hitunglah!

1. (-3) + (+2) – (+5)
2. (+6) – (-7) + (-13)
3. (-6) – (+1) + (-3) – (-8)
4. 4 – 7 + 10 – 1
5. -12 + 4 – 3 + 7

Jawaban:

1. (-3) + (+2) – (+5) = -3 + 2 – 5 = -1 – 5 = -6
2. (+6) – (-7) + (-13) = 6 + 7 – 13 = 13 – 13 = 0
3. (-6) – (+1) + (-3) – (-8) = -6 – 1 – 3 + 8 = -10 + 8 = -2
4. 4 – 7 + 10 – 1 = -3 + 10 – 1 = 7 – 1 = 6
5. -12 + 4 – 3 + 7 = -8 – 3 + 7 = -11 + 7 = -4

Baca juga: Operasi Hitung Pembagian Bilangan Bulat

Contoh soal 5

Hitunglah penjumlahan dan pengurangan berikut!

1. -2 + (-10) – 6
2. 13 + (-2) – 5 – (-7)
3. -7 – (+8) – (-3) + 9
4. 1 + (-0,6) – 0,8
5. 

Jawaban:

1. -2 + (-10) – 6= -2 – 10 – 6 = -12 – 6 = -18
2. 13 + (-2) – 5 – (-7) = 13 – 2 – 5 + 7 = 11 – 5 + 7 = 6 + 7 = 13
3. -7 – (+8) – (-3) + 9 = -7 – 8 + 3 + 9 = -15 + 3 + 9 = -12 + 9 = -3
4. 1 + (-0,6) – 0,8 = 1 – 0,6 – 0,8 = 0,4 – 0,8 = -0,4
5.