Question

va rog frumos ajutaima ex 6 (a,b) VA DAU COROANA

Answer 1

a) 1/2 + 5/2 : 2/2 * 2 * 1/4=

1/2 + 5/2 * 2 * 1/4=

1/2+5/4= aducem la acelasi numitor

2/4+5/4=7/4

b)0.2 + 0.2 * 0.18 : 0.05 -0.2=

0.2 + 0.036 : 0.05 -0.2=

0.2 + 0.72 - 0.2=

0.74 - 0.2=0.72

Cu placer!!!:))) ;))

Answer 2

1/2+21/2÷(1/2+1/2)×2×(1/2)²=
1/2+5/2÷(2/2)×2×1/4=
1/2+5/2×2/2×2×1/4=
1/2+5/2+1/4 se  amplifica cu fiind numitorul comun 4 si avem
2+10+1/4=13/4

0.2+0.2×(0.2-0.02)÷(0.2)²-0.2=
2/10+2/10×(2/10-2/100)÷(2/10)²-2/10
 fractia din paranteza are ca numitor comun 100
2/10+2/10×(20-2/100)÷(4/100)-2/10
2/10+2/10×18/100×100/4-2/10
se fac simplificari  si ramane
2/10+18/10-2/10=18/10=1.8
succes