1)2/47 * 9.4 + 5.6=1
2/47 * 9 4/10= 2/47* 94/10= 2/5
2/5+5 6/10= 2/5+ 6/10= 4/10+ 6/10= 1
2)2.1-6.2*3/31= 1 1/2
6 2/10*3/31=62/10 * 3/31= 6/10
2 1/10 - 6/10= 21/10 - 6/10= 15/10=3/2= 1 1/2
3)5.8 : 9 2/3 + 8.04= 8 16/25
5 8/10 :9 2/3 = 58/10*3/29=6/10
6/10 + 8 4/100= 60/100 + 4/100= 64/100=32/50= 8 16/25