4. Oblicz:
a) -2 1/5 + 3,3=
b) 1 5/6 - 3 1/3
c) 4,3 - 7,5
d) -4,5 - 2 1/4
e) -3 1/6 - (- 5 5/6)
f) 7 1/3 + ( - 4 5/6)
g) -5 4/7 + 7
h) 1,23 - 9
i) -6 - (-4 5/9)
Klasa 1 gimnazjum, strona 39 zadanie 4 podręcznik Matematyka z Plusem
/ - kreska ułamkowa.
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a) -2 1/5 + 3,3 = -2,2 + 3,3 = 1,1
b) 1 5/6 - 3 1/3 = 11/6 - 10/3 = 11/6 - 20/6 = - 9/6 = - 1 1/2
c) 4,3 -7,5 = -3,2
d) -4,5 - 2 1/4 = -4,5 - 2,25 = -6,75
e) -3 1/6 - ( - 5 5/6) = -3 1/6 + 5 5/6 = -19/6 + 35/6 = 16/6 = 2 2/3
f) 7 1/3 + ( - 4 5/6) = 22/3 - 29/6 = 44/6 - 29/6 = 15/6 = 2 1/2
g) -5 4/7 + 7 = 1 3/7
h) 1,23 - 9 = -7,77
i) -6 - ( -4 5/9) = -6 + 4 5/9 = -1 4/9
a) -2 1/5 + 3,3= -2 2/10 + 3 3/10 = 1 1/10
b) 1 5/6 - 3 1/3 = 1 5/6 - 3 2/6 = 11/6 - 20/6 =-9/6 = -1 1/2
c) 4,3 - 7,5 = 43/10 - 75/10 = -32/10 = -3 1/5
d) -4,5 - 2 1/4 = -45/10 - 9/4 = -90/20 - 45/20 = - 135/20 = -6 3/4
e) -3 1/6 - (- 5 5/6) = - 19/6 + 35/6 = 16/6 = 2 2/3
f) 7 1/3 + ( - 4 5/6) = 22/3 - 29/6 = 44/6 -29/6 = 15/6 = 2 1/2
g) -5 4/7 + 7 = - 39/7 + 49/7 = 10/7 = 1 3/7
h) 1,23 - 9 = 123/100 - 900/100 = - 777/100 = - 7 77/100
i) -6 - (-4 5/9) = -6 + 4 5/9 = -54/9 + 41/9 = - 13/9 = -1 4/9