c.(1- 7\9)*(5 1\5 - 7\10)+ [1-(1\10)²] : 9 =
d.3\200 * ( 27\50 : 1 4\5 + 2\3* 5 1\10) * 33 1\3 =
Prosze, to na jutro ! ;(
P.S. np. 1\10 =Ułamek :)
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c.(1- 7\9)*(5 1\5 - 7\10)+ [1-(1\10)²] : 9 =2/9*(5 2/10-7/10)+[1-1/100]:9=2/9*4 5/10+99/100:9=2/9*45/10+99/100*1/9=1+11/100=1 11/100
d.3\200 * ( 27\50 : 1 4\5 + 2\3* 5 1\10) * 33 1\3 =3/200*(27/50:9/5+2/3*51/10)*100/3=3/200*(27/50*5/9+17/5)*100/3=3/200*(3/10+17/5)*100/3=3/200*(3/10+34/10)*100/3=3/200*37/10*100/3=37/20=1 17/20