Question

a)Afla numarul necunoscut din fiecare expresie,dupa exemplul oferit.

20x e-(1 950+550): 100=6 175

35x f+(800-752:4)x 2=551

g: 25 +(100-1632:51)x =286

244-h x 5+(300-6x16):4=225

Answer 1

Răspuns:

Explicație pas cu pas:

20 × e - ( 1 950 + 550 ) : 100 = 6 175      

20 × e - 2 500 : 100 = 6 175

20 × e - 25 = 6 175

20 × e = 6 175 + 25

20 × e = 6 200

e = 6 200 : 20

e = 310

_______________

35 × f + ( 800 - 752 : 4 ) : 2 = 551      

35 × f + ( 800 - 188 ) : 2 = 551

35 × f + 612 : 2 = 551

35 × f + 306 = 551

35 × f = 551 - 306

35 × f = 245

f = 245 : 35

f = 7

___________________________

g : 25 + ( 100 - 1 632 : 51 ) × 2 = 286    

g : 25 + ( 100 - 32 ) × 2 = 286

g : 25 + 68 × 2 = 286

g : 25 + 136 = 286

g : 25 = 286 - 136

g : 25 = 150

g = 150 × 25

g = 3 750

____________________

244 - h × 5 + ( 300 - 6 × 16 ) : 4 = 255    

244 - h × 5 + ( 300 - 96 ) : 4 = 255

244 - h × 5 + 204 : 4 = 255

244 - h × 5 + 51 = 255

244 - h × 5 = 255 - 51

244 - h × 5 = 204

h × 5 = 244 - 204

h × 5 = 40

h = 40 : 5

h = 8