Question

Efectuatimi si mie astea va rog frumos dau 20 de puncte + corona!

Answer 1

a) 6/17+7/17=13/17 b) 15/43+18/43=33/43 c) 11/5+5/7=77/35+25/35=102/35 d) 3/4+7/3=9/12+28/12=37/12 e) 3/13+1/11=33/143+3/143=36/143 f) 7/3–2/3=5/3 g) 4 întregi 2/3–1 intreg 1/6=14/3–7/6= 28/6–7/6=21/6(se simplifică cu 3)=7/2 h) 11/15–2/5=(se aducem la numitor comun care este 15) 11/15–6/15=5/15(se simplifică cu 5) =1/3 i) (1/2+3/4+5/6) + (1/2+1/4+1/6) =(6/12+12/12+10/6)+(6/12+3/12+2/12) =38/12+11/12 =49/12 j) (1/21+1/14)–(1/35–1/42)+(1/14–1/21) =(2/42+3/42)–(6/210–5/210)+(3/42–2/42) =5/42–1/210+1/42 =25/210–1/210+25/210 =24/210+25/210 =29/210 k) 0,25+0,39=25/100+39/100=64/100=32/50=16/25 l) 16,8+7,21=168/10+721/100=1680/100+721/100=2401/100 m) 0,(4)+0,(31)=4/9+31/90=40/90+31/90=71/90 n) 15,4(3)+0,4(6)=15 întregi 1543–4/9+46–4/9=15 întregi 1539/9+42/9=1674/9–42/9=1632/9 o) 5/10–0,25=5/10–25/100=50/100–25/100=25/100=1/4 p) 17,2–5,1=172/10–51/10=121/10 q) 137/100–0,12=137/100–12/100=125/100=25/50=5/10=1/2 Sper ca te-am ajutat ! ^_^