Question

Buna dau coroana dar va rog ajutati-ma ca am termen până în 12!!
ex.1 Folosind proprietățile Adunării calculati:
1 2supra 5+3 3supra 5+11supra30+19supra30
ex.2 Dacă a =6 1supra2+3 2supra 3 -4 1supra6 și b=11 5supra6-8 5supra12 -1 calculati E =2supra 3 +a-b​

Answer 1

Răspuns:

1)

1 2/5 + 3 3/5 + 11/30 + 9/30 =?

(1*5+2) / 5 + (3*5+3) / 5 + 11/30 + 19/30

7/5 + 18/5 + 11/30 + 19/30

(42+108+11+19) / 30 =  (150+30) / 30 = 180/30 = 18/3 = 6

2)

a=6 1/2 + 3 2/3 - 4 1/6

a=(6*2+1) / 2 + (3*3+2) / 3 - (4*6+1) / 6

a=13/2 + 11/3 - 25/6 => a=(39+22-25) / 6 => a=(61-25) / 6 = 36/6 = 6 => a=6

b=11 5/6 - 8 5/12 - 1

b=(11*6+5) / 6 - (8*12+5) / 12 - 1

b=71/6 - 101/12 - 1 => (142-101-12) / 12 = > b=29/12

E = 2/3 + a-b => 2/3 + 6-29/12 = (2+18) / 3 - 29/12 = 20/3 - 29/12 = 80/12-29/12 = 51/12

E=2/3 + a-b = 51/ 12

Answer 2

Răspuns:

Salut

Ex,1.

1 2/5+3 3/5+11/30+19/30=

2/5+9/5+11/30+19/30=

16/5.

Ex,2.

a= 6 1/2+3 2/3-4 1/6=

3+2-2 1/3=

5-2/3=13/3.

b=11 5/6-8 5/12-1=55/6-10/3-1=29/6.

E= 2/3 + 13/3 - 29/6 = 4+26-29/6= 1/6.

==evergreen==