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afla numărul necunoscut;

a×(72:8)=2×9

b:(70-62)=27:3

(64-24):c=24:3

d×(64:8)=100-44

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Răspuns :

Crys157724

a×(72:8)=2×9

a×9=18

a=18:9

a=2

________________

b:(70-62)=27:3

b:8=9

b=9×8

b=72

______________

(64-24):c=24:3

40:c=8

c=40:8

c=5

_______________

d×(64:8)=100-44

d×8=56

d=56:8

d=7
a × ( 72 : 8 ) = 2 × 9

a × 9 = 18

a = 18 : 9

a = 2

b : ( 70 - 62 ) = 27 : 3

b : 8 = 9

b = 9 × 8

b = 72

( 64 - 24 ) : c = 24 : 3

40 : c = 8

c = 40 : 8

c = 5

d × ( 64 : 8 ) = 100 - 44

d × 8 = 56

d = 56 : 8

d = 7

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