Bardzo proszę o pomoc :
1. Wykonaj działania:
a) 3 i 5/9 + 2 i 1/6 =
b) 5/9 - 2/7 =
c) 2 i 1/3 - 3/4 =
d) 8/15 + 11/20 + 3/10 =
e) 7 i 5/6 - (1 i 2/3 + 4 i 7/9) =
2. Wykonaj działania:
a) 3 i 3/4 + 2 i 1/6 =
b) 5/7 - 1/9 =
c) 2 i 1/2 - 2/3 =
d) 2/3 + 4/5 + 5/6 =
e) 9 i 1/8 - ( 2 i 1/2 + 3 i 5/6) =
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Zad.1
Zad.2
1.
a) 3 i 5/9+2 i 1/6= 32/9 + 13/6= 64/18+39/18= 103/18= 5 13/18
b) 5/9-2/7= 35/63-18/63= 17/63
c) 2 i 1/3-3/4= 7/3-3/4= 28/12-9/12= 19/12= 1 i 7/12
d) 8/15+11/20+3/10= 32/60+33/60+18/60= 83/60= 1 i 23/60
e) 7i 5/6- (1i 2/3+4 i 7/9)= 47/6-(5/3+43/9)= 47/6-(15/9+43/9)= 47/6-58/9)= 141/18-116/18= 25/18= 1 i 7/18
2.
a) 3 i 3/4+2 i 1/6= 15/4+13/6= 45/12+26/12= 71/12= 5 i 11/12
b) 5/7-1/9= 45/63-7/63= 38/63
c) 2 i 1/2-2/3= 5/2-2/3= 15/6-4/6= 11/6= 1 i 5/6
d) 2/3+4/5+5/6= 20/30+24/30+25/30= 69/30= 2 i 9/30= 2 i 3/10
e) 9 i 1/8- (2 i 1/2 + 3 i 5/6)= 73/8- (5/2+23/6)= 73/8-(15/6+23/6)= 73/8-38/6= 219/24-152/12= 67/12= 5 i 7/12
proszę o naj :)