Matematyka
Izulka5555
2017-06-27 02:26:57
zad 3 a -3/4+5/6 b 5/6-8/9 c 1 1/6-7/9 d 3/5-1 2/3 e 2 2/9+1 5/12 f. 1 1/7+2 2/3 g 3 2/5-5 2/3 h 4 1/6-2 7/15
Odpowiedź
ewus1223789
2017-06-27 07:54:05

Witaj :) [a] -3/4 + 5/6 = -18/24 + 20/24 = 2/24 [b]  5/6 - 8/9 = 45/54 - 48/54 = -3/54 = -1/18 [c] 1 1/6 - 7/9 = 7/6 - 7/9 = 63/54 - 42/54 = 21/54 = 7/18 [d] 3/5 -1 2/3 = 3/5 - 5/3 = 9/15 - 25/15 = -16/15 = -1 1/15 [e] 2 2/9 + 1 5/12 = 20/9 + 17/12 = 240/108 + 153/108 = 393/108 = 3 69/108 [f] 1 1/7 + 2 2/3 = 8/7 + 8/3 = 24/21 + 56/21 = 80/21 = 3 17/21 [g] 3 2/5 - 5 2/3 = 17/5 - 17/3 = 51/15 - 85/15 = -34/15 = - 2 4/15 [h] 4 1/6  -2 7/15 = 25/6 - 37/15 = 375/90 - 222/90 = 153/90 = 1 63/90 Mam nadzieję, że pomogłam.

welon99
2017-06-27 07:55:20

a). -3/4 +5/6 = -9/12 +10/12 = 1/12 b). 5/6 - 8/9 = 15/18 - 16/18 = -1/18 c). 1 i 1/6 - 7/9 = 1 i 3/18 - 14/18 = 21/18 - 14/18 = 7/18 d). 3/5 - 1 i 2/3 = 9/15 - 1 i 10/15 = -1 i 1/15 e). 2 i 2/9 +1 i 5/12 = 2 i 8/36 +1 i 15/36 = 3 i 23/36 f). 1 i 1/7 +2 i 2/3 = 1 i 3/21 +2 i 14/21 = 3 i 17/21 g). 3 i 2/5 - 5 i 2/3 = 3 i 6/15 - 5 i 10/15 = -2 i 4/15 h). 4 i 1/6 - 2 i 7/15 = 4 i 5/30 - 2 i 14/30 = 3 i 35/30 - 2 i 14/30 = 1 i 21/30 = = 1 i 7/10

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