Question

7 51. Calculează a - b *c+b, ştiind că:
a= b x 42
b- c= (125 x 4 - 16 x 25): 2
c: 1 = 100 - 3 (32 × 10 - 3 99)​

Answer 1

Răspuns:

b- c= (125 x 4 - 16 x 25): 2

b-c=(500-400):2

b-c=100:2

b-c=50

c: 1 = 100 - 3 (32 × 10 - 3 x99)

c:1=100-3(320-397)

c:1=100-3x23

c:1=100-69

c:1=31

c=31x1

c=31

b-c=50

b-31=50

b=50+31

b=81

a=bx42

a=81x42

a=3402

a-b x c+b

3402-81x31+81=

3402-2511+81

891+81=972