Oblicz : ( uwaga ułamki to np. 12/7 czyt. dwanaście siudmych ) (dziwne ułamki to 1 5/7 czyt. jedna cała i pięć siudmych)
a) 2,2 + 12/7 + (-1,2) + ( - 1 5/7 ) =
b) 6 1/2 + (-3,25) + (-1 3/4) +1 =
c) -2,9 + 5/8 + (-0,1) + 0,375 =
d) -(-(-3) + (-2) + (-(-3)) =
e) -15 + ( -4 -(-7 )) - (- 8 ) + (-11) =
f) 28-39 + (-14) - (-12) -81 =
g) 37+ (-18 )-(-(-48) +c(-9) =
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a)2,2+12/7+(-1,2)+(-1 5/7)=
=2,2+1 6/7-1,2-1 5/7=
=1+ 1/7=
=1 1/7
b) 6 i 1/2 +(-3,25)+(-1i3/4)+1= 6,5 - 3,25 - 1,75 +1 = 3,25 - 1,75 + 1 = 1,5 + 1 = 2,5
d)-(-(-3)+(-2))+(-(-3))= -(3-2) +3 = -1 +3 = 2
e)-15+(-4-(-7))-(-8)+(-11)= -15 + 9-4+7) +8 -11 = -15+3+8-11 = -12+8-11= -4-11 = -15
f)28-39+(-14)-(-14)-(-12)-81= -11 - 14+14+12-81 = 1-81 = 80
g)37+(-18)-(-(-48))+(-9)= 37-18-48-8 = 19-48-8 = -29-8 = -37