Question

6. Aflaţi:
12 309 + a = 31 415
508 611 - a= 39 423
a =
a
a =
a =
6 x a= 54
a: 4= 9 rest 3
a=
a=
a=
a=​

Answer 1

$12309 + a = 31415$

$a = 31415 - 12309$

$a = 19106$

$6 \times a = 54$

$a = \frac{54}{6}$

$a = 9$

$a \div 4 = 9 \: rest \: 3$

Vim aplica recula aceasta:

D=ΕC+R

$a = 4 \times 9 + 3$

$a = 36 + 3$

$a = 39$