Răspuns :
a + b = 854
a - b = 343
Metoda figurativa;
a |__|+343|
b |__| } 854
1 + 1 = 2 ( segmente egale )
854 - 343 = 511 ( suma celor doua segmente egale)
511 : 2 = 255 rest 5 ( b )
255,1 + 343 = 598 rest 5 ( a )
V:598,5 + 255,5= 854
598,5 - 255,5=343
a - b = 343
Metoda figurativa;
a |__|+343|
b |__| } 854
1 + 1 = 2 ( segmente egale )
854 - 343 = 511 ( suma celor doua segmente egale)
511 : 2 = 255 rest 5 ( b )
255,1 + 343 = 598 rest 5 ( a )
V:598,5 + 255,5= 854
598,5 - 255,5=343