Question

Answer 1

a: \(\left(-2,5\cdot0,38\cdot0,4\right)-\left\lbrack0,125\cdot3,15\cdot\left(-8\right)\right\rbrack\)

\(=-0,38-\left(-3,15\right)\)

=-0,38+3,15

=2,77

b: \(\left\lbrack\left(-20,83_{}\right)\cdot0,2+\left(-9,17\right)\cdot0,2\right\rbrack:\left\lbrack2,47\cdot0,5-\left(-3,53\right)\cdot0,5\right\rbrack\)

\(=0,2\cdot\left(-20,83-9,17\right):\left\lbrack0,5\cdot\left(2,47+3,53\right)\right\rbrack\)

\(=0,2\cdot\left(-30\right):\left\lbrack0,5\cdot6\right\rbrack=-6:3=-2\)