Question

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Calculați:
a) [6,7+3x(0,9+1,2)]x0,18
b) [2,5+17: (1,25-0,85)]x1,2
c) 7,8x[0,2x(2,75-1,39)+21,6]
d) 14,4:[(2,3+5,14):7,44+0,2]

Answer 1

a) [6,7+3x(0,9+1,2)]x0,18

= [6,7+(3x2,1x0,18)]=6,7+1,134=7,834

b) [2,5+17:(1,25-0.85)]x1,2

=[2,5+(17:0,4x1,2)]=2,5+51=53,5

c) 7,8x[0,2x(2,75-1,39)+21,6]

=7,8x[(0,2x1,36)+21,6]=(7,8x0,272)+21,6=2,1216+21,6=23,7216

d) 14,4:[(2,3+5,14):7,44+0,2]

=(14,4:7,44:7,44)+0,2=14,4+0,2=14,6