Question

Tolong bantu jawab no 3&4 kak
pakai cara​

Answer 1

Nomor 3

a. Itu memakai konsep : a + (b + c)

-8 + (6 + n) = -8 + 9

-8 + (6 + 9) = -8 + 9

b. Itu memakai konsep : (a + b) + c = a + (b + c)

(n + 13) + 11 = 16 + (13 + 11)

( 16 + 13) + 11 = 16 + (13 + 11)

c. Memakai konsep : (a + b) × c = (a × c) + (b × c)

(-21 + n) × 13 = (-21 × 13) + (7 × 13)

( -21 + 7) × 13 = (-21 × 13) + (7 × 13)

d. Memakai konsep : a × (b - c) = (a × b) - (a × c)

35 × (42 - 20) = (35 × n) - (35 × 20)

35 × (42 - 20) = (35 × 42) - (35 × 20)

Nomor 4

a. -6 × -13 = 78

b. -5 × 32 = -160

c. -19 × (-16) = 304

d. -12 × (-45) = 540

Jadikan jawaban tercerdas ya thank you