Jawaban:

b + c

1. 5 + 4 = 9

2. 6 + (-3) = 3

3. (-7) + 2 = -5

4. (-8) - (-1) = (-8) + 1 = -7

a × (b+c)

1. 1 × (5 + 4) = 1 × 9 = 9

2. (-2) × {6 + (-3)} = (-2) × 3 = -6

3. 3 × {(-7) + 2} = 3 × (-5) = -15

4. (-4) × {(-8) - (-1)} = (-4) × {(-8) + 1} = (-4) × (-7) = 28

a × b

1. 1 × 5 = 5

2. (-2) × 6 = -12

3. 3 × (-7) = -21

4. (-4) × (-8) = 32

a × c

1. 1 × 4 = 4

2. (-2) × (-3) = 6

3. 3 × 2 = 6

4. (-4) × (-1) = 4

(a × b) + (a × c)

1. (1 × 5) + (1 × 4) = 5 + 4 = 9

2. {(-2) × 6} + {(-2) × (-3)} = -12 + 6 = -6

3. {3 × (-7)} + (3 × 2) = -21 + 6 = -15

4. {(-4) × (-8)} + {(-4) × (-1)} = 32 + 4 = 36

Penjelasan dengan langkah-langkah:

jika dibelakang pengurangan itu bilangan negatif maka menjadi penjumlahan contoh 2 - (-4) = 2+4 = 6

didalam perkalian,

1. jika bilangan negatif dikalikan bilangan positif maka hasilnya negatif contoh -2 × 4 = -8

2. jika bilangan positif dikalikan bilangan negatif maka hasilnya negAtif contoh 3 × -6 = -18

2. jika bilangan negatif dikalikan bilangan negatif maka hasilnya positif 2 × 2 = 4

rumus mudah nya

- × + = -

+ × - = -

- × - = +

semoga membantu ya kak