Question

1) (-4)×(7/10)×52) (-8/15)×(-1)×(-3/4)3) (-3/4)×(-5)×4​

Answer 1

1)

(-4)×(7/10)×5

(-4)×0,7×5

-(4×0,7×5)

-(20×0,7)

-14

2)

(-8/15)×(-1)×(-3/4)

(-8/15)×(-1)×(-3÷4)

(-8/15)×(-1)×(-0,75)

(-8/15)×(-1)×(-3/4)

-8/15×1×3/4

-2/15×3

-2/5

3)

(-3/4)×(-5)×4

(-0,75)×(-5)×4

0,75×5×4

3×5

15

Answer 2

1. (-4) × (7/10) × 5

To multiply fractions, you multiply the numerators and denominators separately.

(-4) × (7/10) = (-4 × 7) / (1 × 10) = -28/10

Simplifying the fraction by dividing both numerator and denominator by their greatest common divisor (which is 2), we get:

-28/10 = -14/5

Now we multiply the result by 5:

(-14/5) × 5 = (-14 × 5) / 5 = -14

Therefore, (-4) × (7/10) × 5 = -14.

2. (-8/15) × (-1) × (-3/4)

Similarly, we multiply the numerators and denominators separately:

(-8/15) × (-1) × (-3/4) = (-8 × -1 × -3) / (15 × 1 × 4) = 24/60

Simplifying the fraction by dividing both numerator and denominator by their greatest common divisor (which is 12), we get:

24/60 = 2/5

Therefore, (-8/15) × (-1) × (-3/4) = 2/5.

3. (-3/4) × (-5) × 4

Again, we multiply the numerators and denominators separately:

(-3/4) × (-5) × 4 = (-3 × -5 × 4) / (4 × 1) = 60/4

Simplifying the fraction by dividing both numerator and denominator by their greatest common divisor (which is 4), we get:

60/4 = 15

Therefore, (-3/4) × (-5) × 4 = 15.