1)0,5 +1/3 = 5/10+1/3=15+10/30=5/6
2)2/3-0,25=2/3-25/100=2/3-1/4=8-3/12=5/12
3) 0,125+5/12=125/1000+5/12=1/8+5/12=3+10/24=13/24
1) 3*3=9
2) 12+ (12+6) +(18+6)+(24+6)+(30+6)+(36+6) =12 + 18 + 24 + 30 + 36 + 42= 30+30+60+42=162
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