afla nr necunoscut a+2436=9367 b-5269=2875 94-c=2897 ax2x3=24 16x2:a=4 45:5xa=63 8x(3+a)=72 (a-5)x6=36 (9+a):2=24 si acest calcul 1+2x5-(8x5:10+5-63:9)x4-(42:7-32:8) Va rog repede, este pentru sora mea!!

Răspuns:

Explicație pas cu pas:

a+2436=9367

a = 9367 - 2436 = 6931

b-5269=2875

b = 5269 + 2875 = 8144

94-c=2897

c = 94 - 2897 = -2803

ax2x3=24

a x 6 = 24

a = 24 : 6 = 4

16x2:a=4

32 : a = 4

a = 32 : 4 = 8

45:5xa=63

9 x a = 63

a = 63 : 9 = 7

8x(3+a)=72

3 + a = 72 : 8 = 9

a = 9 - 3 = 6

(a-5)x6=36

a - 5 = 36 : 6 = 6

a = 5 + 6 = 11

(9+a):2=24

9 + a = 24 x 2 = 48

a = 48 - 9 = 39

1+2x5-(8x5:10+5-63:9)x4-(42:7-32:8)

= 1 + 10 - (40 : 10 + 5 - 7) x 4 - (6 - 4)

= 11 - (4 + 5 - 7) x 4 - 2

= 11 - 2 x 4 - 2

= 11 - 8 - 2

= 3 - 2

= 1

Explicație pas cu pas:

a+2 436=9 367

a=9 367-2 436

a=6 931

v:6 931+2 436=9 367

b-5 269=2 875

b=2 875+ 5 269

b=8 144

v:8 144-5 269=2 875

94-c=2 897

c=94-2 897

c=-2 803

v:94-(-2803)=2 897

a×2×3=24

a×6=24

a=24:6

a=4

v:4×2×3=8×3=24

16x2:a=4

32:a=4

a=32:4

a=8

v:16×2:8=32:8=4

45:5×a=63

9×a=63

a=63:9

a=7

v:45:5×7=9×7=63

8×(3+a)=72

3+a=72:8

3+a=9

a=9-3

a=6

v:8×(3+6)=8×9=72

(a-5)×6=36

(a-5)=36:6

a-5=6

a=6+5

a=11

v:(11-5)×6=6×6=36

(9+a):2=24

(9+a)=24×2

9+a=48

a=48-9

a=39

v:(9+39):2=48:2=24

1+2×5-(8×5:10+5-63:9)×4-(42:7-32:8)=

1+2×5-(40:10+5-7)×4-(6-4)=

1+2×5-(4+5-7)×4-2=

1+2×5-(9-7)×4-2=

1+2×5-2×4-2=

1+10-8-2=

11-8-2=

3-2=

1