Question

a) –15 × 5 : (–25) × (–19) =
b) –9 × (–32) : (–8) × 4 =
c) (–4 i 1/2) × 6 : (–3) × 2 i 1/6=
d) [(–36) – (–40)] × 3 i 1/2 – 2 i 2/5 : (–18 + 12) =

a) –25 × 3 : (–15) × (–13) =
b) –7 × (–36) : (–9) × 4 =
c) (–3 i 1/3) × 9 : (–5) × 3 i 1/4=
d) [(–24) – (–30)] × 2 i 1/3 – 1 i 3/5 : (–17 + 13) =

Answer 1

x-to mnożenie

 

a) -15x5:(-25)x(-19)= -75:(-25)x(-19)= 3x(-19)= -57

b) -9x(-32):(-8)x4= 288:(-32)= -9

c) (-4,5)x6:(-3)x2 i 1/6= -27:3x2i1/6= -9x2i1/6= -19,5

d) [(-36)-(-40)]x3,5-2i2/5:(-18+12)=4x3,5-2i2/5:(-6)=14x2/5=5i3/5

 

 

Answer 2

a)  –15 × 5 : (–25) × (–19) =-15 x (-1/5) x (-19) = 3 x (-19) = -57

b) –9 × (–32) : (–8) × 4 =(-9) x 4 x 4 = -36 x 4 = -144

c)(–4 i 1/2) × 6 : (–3) ×  2 i 1/6=(-27) : 6 i  1/2 = (-27) : 13/2 = (-27) x 2/13 = -54/13 = -4 i 2/13

d) [(–36) – (–40)] × 3 i 1/2 – 2 i 2/5 : (–18 + 12) =(-36) +40 x 3 i 5/10 - 2 i 4/10 = 4 x 1 i 1/10 = 4.4