Odpowiedź:
- 2/9*4,5-1/7=2/9*4 5/10-1/7=2/9*45/10-1/7=90/90-1/7=630/630-90/630=540/630=6/7
- 12 i 3/7+0,3*5/6 =12 i 3/7 + 3/10 * 5/6 = (skracam 3 z 6 oraz 10 z 5)
= 12 i 3/7 + 1/2 * 1/2=12 i 3/7 + 1/4=12 i 12/28 + 7/28=12 i 19/28
3. 6 2/9:4 2/3+ 1,4=56/9:14/3+1,4=56/9*3/14+1,4=168/126+1,4=1i42/126+1,4=1i7/21+1i4/10=1i1/3+1i4/10=1i10/30+1i12/30=2i22/30=2i11/15
Szczegółowe wyjaśnienie:
