1
1)-14 2/3+17,3=-44/3+173/10=-440/30+519/30=79/30=2 19/30
2)4 1/5-6,12=21/5-612/100=420/100-612/100=-192/100=-1,92
3)-7015+7,14=−7007,86
4)2 19/30:23,7=79/30:237/10=79/30*10/237=1/9
5)-1,92*(-7007,86)=13455,0912
6)1/9-13455,0912=1/9-134550912/10000=10000/90000-134550912/90000=134540912/90000=1494 80912/9000=1494 10114/11250
2.
1)8/51*15,3=8/51*153/10=12/5=2 2/5
2)2 8/51-2 2/5=110/51-12/5=550/255-612/255=-62/255
3)-62/255:16/51=-62/255*51/16=-1581/2040=-527/680
4)-527/680-38,4=-527/680-384/10=527/680+26112/680=26639/680=39,175
5)39,175:(-0,03)=39175/1000:(-3/100)=39175/1000*100/3=-391750/3=-130583 1/3
3.
1)-3 1/8*(-0,8)=25/8*8/10=25/10=2,5
2)7/18-2,5=7/18-25/10=70/180-450/180=-380/180=-2 20/180=- 2 1/9
3)-2 1/9+(-3 5/6)= -19/9+(-23/6)=-114/54+(-207/54)=-321/54=-5 51/54
4)-5 5/6:(-5 51/54)=35/6:321/54=35/6*54/321=315/321