Oblicz :
a) (-1,7)+0,9 =
b) 18+(-20,7)=
c) (-2,7)+ (-3,6)=
d) (-3,4)-(-1,5)=
e)jedna czwarta - jedna druga =
f) ( - siedem dwunastych + trzy ósme =
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a) -0,8
b) -2,7
c) -6,3
d) -4,9
e) - 1/4
f) -5/24
a) (-1,7) + 0,9 = - 0,8
b) 18 + (-20,7) = - 2,7
c) (-2,7) + (-3,6) = - 6,3
d) (-3,4)-(- 1,5 ) = -1,9
e) 1/4 - 1/2 = 1/4 - 2/4 = - 1/4
f) (-7/12) + 3/8 = (-14/24) + 9/24 = - 5/24