Matematică, întrebare adresată de deniss216, 8 ani în urmă

Va rog frumos sa ma ajutat cat mai repede​

Anexe:

Răspunsuri la întrebare

Răspuns de carmentofan
0

Răspuns:

Explicație pas cu pas:

a*b + a*c = 15

a*(b + c) = 15

a*5 = 15

a = 3

___________________

5 + 10 + 15 + 20 + 25 + 30 + 35 + 40 = (5 + 40) + (10 + 35) + (15 + 30) + (20 + 25) = 4*45 = 180

____________________

x + x + 1 + x + 2 = 21

3x + 3 = 21

3x = 21 - 3 = 18

x = 6

Numerele sunt 6, 7,8

6*7*8 = 336

___________________

1*2*3*4*5*6*7*8*9*10*11*12*13*14*15*16*17*18*19*20*21

zerourile provin de la 10, 20, 2*5, 4*15, deci 4 zerouri


deniss216: cum adica numerele alea cu steluta asa se scriu
Răspuns de raluca10kn
0

Răspuns:

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