Question

1) Calculați:
a)18,23-5,23-1,(2)
b)1,(7)+2,(7)+3,(7)
c)39,5+17,33-100,88
d)
$\frac{29}{?30} - 0.2(5) + \frac{27}{?5} - 0.3(1)$
e)
$(- 2 \times \frac{1}{3} ) + (1 \times \frac{5}{6} + \frac{3}{2}$
f)
$( - 7 \times \frac{1}{3} + 1 \times \frac{2}{9} ) + ( - 2 \times \frac{2}{3} + \frac{5}{9} )$
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Answer 1

Răspuns:

a) 18,23-5,23-1,(2)= 13-1,(2)=11,(8)

b) 1,(7)+2,(7)+3,(7)=8,(1)

c) 39,5+17,33-100,88= -44,05

d) 29/30-0,2(5)+27/5-0,3(1)=0,9(6)-0,2(5)+5,4-0,3(1)=5,8

e) -2/3+5/6+3/2=-4/6+5/6+9/6=10/6=5/3

f) -7/3+2/9-4/3+5/9= -21/9+2/9-36/9+5/9=-50