A) [142-2*(17+39)] :4 = C) 12,42:0,3-0,72*10=
a)
[ 142 -2*(17+39)] :4 = [142 -2 * 56] :4 = [142 -112] :4 = 30 :4 = 7,5
c)12,42 : 0,3 - 0,72 * 10 = 41,4 - 7,2 = 34,2
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a)
[ 142 -2*(17+39)] :4 = [142 -2 * 56] :4 = [142 -112] :4 = 30 :4 = 7,5
c)12,42 : 0,3 - 0,72 * 10 = 41,4 - 7,2 = 34,2