Afla numarul necunoscut:. 4+[4-(4+4÷4×4-4)+X]÷4=8. a÷6×6÷7×7=8+8-9÷9. (b÷5-5)×9+186:6=400÷100 8+6×[4+27÷(0+c×9)]=51-51÷51. [12-9÷3+(2-9)÷3]×d+1=41
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4 + [ 4 - ( 4 + 4 : 4 × 4 - 4 ) + X ] : 4 = 8
4 + [ 4 - ( 4 + 4 - 4 ) + X] : 4 = 8
4 + ( 4 - 4 + X) : 4 = 8
(0 + X): 4 = 8 - 4
X : 4 = 4
X = 4 × 4
X= 16
a : 6 × 7 : 7 × 5= 8 + 8 - 9 : 9
a : 6 × 7 : 7 × 5 = 16 - 1
a : 6 × 7 : 7 × 5 = 15 → am modificat exercitiu
a= 15 : 5 × 7 : 7× 6 → metoda mersului invers
a = 3 × 7 : 7 × 6
a = 21 : 7 × 6
a = 3 × 6
a = 18
(b : 5 - 5 ) × 9 + 186 : 6 = 400 : 10 → e gresit, voi modifica 10, nu 100
( b : 5 - 5 ) ×9 + 31 = 40
( b : 5 - 5 ) × 9 = 40 - 31
b : 5 - 5 = 9 : 9
b : 5 - 5 = 1
b : 5 = 1 + 5
b : 5 = 6
b = 6 × 5
b = 30
8 + 6 × [ 4 + 27 : ( 0 + c × 9 ) ] = 51 - 51 : 51
8 + 6 × [ 4 + 27 : ( 0 + c × 9 ) ] = 51 - 1
8 + 6 × [ 4 + 27 : ( 0 + c × 9 ) ] = 50
6 × [ 4 + 27 : ( 0 + c × 9 ) ] = 50 - 8
6 × [ 4 + 27 : ( 0 + c × 9 ) ] = 42
4 + 27 : ( 0 + c × 9 ) = 42 : 6
4 + 27 : ( 0 + c × 9 ) = 7
27 : ( 0 + c × 9 ) = 7 - 4
27 : ( 0 + c × 9 ) = 3
c × 9 = 27 : 3
c × 9 = 9
c = 9 : 9
c = 1
[12 - 9 : 3 + ( 12 - 9 ) : 3 ] × d + 1 = 41
(12 - 3 + 3 : 3 ) × d + 1 = 41
(9 + 1 ) × d + 1 = 41
10 × d + 1 = 41
10 × d = 41 - 1
10 × d = 40
d = 40 : 10
d = 4
4 + [ 4 - ( 4 + 4 - 4 ) + X] : 4 = 8
4 + ( 4 - 4 + X) : 4 = 8
(0 + X): 4 = 8 - 4
X : 4 = 4
X = 4 × 4
X= 16
a : 6 × 7 : 7 × 5= 8 + 8 - 9 : 9
a : 6 × 7 : 7 × 5 = 16 - 1
a : 6 × 7 : 7 × 5 = 15 → am modificat exercitiu
a= 15 : 5 × 7 : 7× 6 → metoda mersului invers
a = 3 × 7 : 7 × 6
a = 21 : 7 × 6
a = 3 × 6
a = 18
(b : 5 - 5 ) × 9 + 186 : 6 = 400 : 10 → e gresit, voi modifica 10, nu 100
( b : 5 - 5 ) ×9 + 31 = 40
( b : 5 - 5 ) × 9 = 40 - 31
b : 5 - 5 = 9 : 9
b : 5 - 5 = 1
b : 5 = 1 + 5
b : 5 = 6
b = 6 × 5
b = 30
8 + 6 × [ 4 + 27 : ( 0 + c × 9 ) ] = 51 - 51 : 51
8 + 6 × [ 4 + 27 : ( 0 + c × 9 ) ] = 51 - 1
8 + 6 × [ 4 + 27 : ( 0 + c × 9 ) ] = 50
6 × [ 4 + 27 : ( 0 + c × 9 ) ] = 50 - 8
6 × [ 4 + 27 : ( 0 + c × 9 ) ] = 42
4 + 27 : ( 0 + c × 9 ) = 42 : 6
4 + 27 : ( 0 + c × 9 ) = 7
27 : ( 0 + c × 9 ) = 7 - 4
27 : ( 0 + c × 9 ) = 3
c × 9 = 27 : 3
c × 9 = 9
c = 9 : 9
c = 1
[12 - 9 : 3 + ( 12 - 9 ) : 3 ] × d + 1 = 41
(12 - 3 + 3 : 3 ) × d + 1 = 41
(9 + 1 ) × d + 1 = 41
10 × d + 1 = 41
10 × d = 41 - 1
10 × d = 40
d = 40 : 10
d = 4
Utilizator anonim:
Dar de ce il modifici pe 100 in 10 ??????
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