Question

1. Calculaţi:
a) [(3⁶:3⁴ + 6)+ 25]:4 - 5
b) 12,8x7+1,52²:1,2
c) (2+3x1/12):2 1/2​

Answer 1

Explicație pas cu pas:

a) [(3⁶:3⁴+6)+25]:4-5

[(3²+6)+25]:4-5

[(9+6)+25]:4-5

(15+25):4-5

40:4-5

10-5

5

b) 12,8x7+1,52²:1,2

89,6x+

$( \frac{38}{25})^{2} \div \frac{5}{6}$

89,6x+

$\frac{1444}{625} \times \frac{5}{6}$

89,6x+

$\frac{722}{125} \times \frac{1}{3}$

89,6x+

$\frac{722}{375}$

c)

$(2 + 3 \times \frac{1}{12} ) \div 2 \frac{1}{2}$

$(2 + \frac{1}{4} ) \times \frac{1}{2} \times \frac{1}{2}$

$\frac{9}{4} \times \frac{1}{2} \times \frac{1}{2}$

$\frac{9}{16}$

COROANA??