Question

calculati
a)5+3•0,25
b)0,5+2•(0,25+1)
c)2,3-2•0,75
d)7-2•1/5
e) 1,8+0,75•0,5

Answer 1

$a) \: 5 + 3 \times 0.25 = 5 + 0.75 = 5.75 \\ \\ b) \: 0.5 + 2 \times (0.25 + 1) = 0.5 + 2 \times 1.25 = 0.5 + 2.50 = 3 \\ \\ c) \: 2.3 - 2 \times 0.75 = 2.3 - 1.50 = 0.80 \\ \\ d) \: 7 - 2 \times \frac{1}{5} = 7 - \frac{2}{5} = \frac{35 - 2}{5} = \frac{33}{5} = 6.6 \\ \\ e) \: 1.8 + 0.75 \times 0.5 = 1.8 + 0.375 = 2.175$