Odpowiedzi

2010-04-14T19:46:35+02:00
A)2/3 + 0,6 = 2/3 + 6/10 = 20/30 + 18/30 = 1 i 8/30
b) 4,2 - 1i1/9 = 42/10 - 10/9 = 378/90 - 100/90 = 278/90 = 139/45 = 3 i 4/45
c)3,6 - 1i1/2 = 36/10 - 3/2 = 36/10 - 15/10 = 21/10 = 2 i 1/10
d)2i1/3 : 0,8 = 7/3 : 8/10 = 7/3 x 10/8 = 70/24 = 35/12 = 2 i 11/12
e)5,2 x 2/7 = 52/10 x 2/7 = 52/5 x 1/7 = 52/35 = 1 i 17/35
f)0,6 : 2/3 = 6/10 x 3/2 = 3/10 x 3/1 = 9/10

Prosze! ;>
2010-04-14T19:59:14+02:00
A)2/3 +0,6=2/3*6/10=20/30+18/30=38/30=1i 8/30=1i 4/15
b) 4,2-1i1/9=4i 2/10-1i 1/9= 4i 18/90-1i 10/90=3i 8/90=3i 4/45
c) 3,6-1i1/2=3i 6/10-1 i 1/2= 3i 6/10- 1i 5/10=2i 5/10=2i1/2
d) 2i 1/3 : 0,8= 2i 1/3: 8/10= 7/3 * 10/8= 70/24= 2 i 22/24= 2i 11/12
e) 5,2*2/7= 5i2/10* 2,7=52/10*2/7=52/35=1i 17/35
f) 0,6:2/3=6/10*3/2=9/10

Mam nadzieję, że pomogłam :)
Liczę na najjj... :P