plisssss proszę............................ zad pierwsze i drugie

zad.1 1/4+0,7=0,25+0,7=0,95 1/4+0,7=1/4+7/10=19/20 3/8-0,15=0,375-0,15=0,225 3/8-0,15=3/8-3/20=9/40 1/8+2,5=0,125+2,5=2,625 1/8+2,5=1/8+5/2=21/8=2 5/8 1 1/4·0,3=5/4·0,3=1,25·0,3=0,375 1 1/4·0,3=5/4·3/10=3/8 2/5:0,08=0,4:0,08=5 2/5:0,08=2/5:2/25=5 zad.2 2/3+0,6=2/3+3/5=19/15=1 4/15 4,2-1 1/9=21/5-10/9=139/45=3 4/45 3,6-1 1/2=18/5-3/2=21/10=2 1/10 2 1/3:0,8=7/3:4/5=35/12=2 11/12 5,2·2/7=26/5·2/7=52/35=1 17/35 0,6:2/3=3/5:2/3=9/10 2 3/20+1,27=43/20+127/100=171/50=3 21/50 0,65:6 1/2=13/20:13/2=1/10 4,5-3/4·1/3=9/2-1/4=17/4=4 1/4 (1 2/5+0,5):2=(7/5+1/2):2=19/10:2=19/20 5/8·4,2-(1/4)²=5/8·21/5-(1/4)²=21/8-1/16=41/16=2 9/16 4/7·(0,2+1/4)=4/7·(1/5+1/4)=4/7·9/20=9/35