a) 996 + 45 = 996 + (4 + 41) = (996 + 4) + 41 = 1041;
b) 37 + 198 = (35 + 2) + 198 = 35 + (2 + 198) = 235.
a) 996 + 45 = 996 + (4 + 41) = (996 + 4) + 41 = 1041;
b) 37 + 198 = (35 + 2) + 198 = 35 + (2 + 198) = 235.
a)\(996+45\)\(=996+\left(4+41\right)\)\(=\left(996+4\right)+41\)\(=1041\)
b)\(37+198\)\(=\left(35+2\right)\)\(+198\)\(35+\left(2+198\right)\)\(=235\)