How to calculate 468-132 + 132-68 with simple algorithm

How to calculate 468-132 + 132-68 with simple algorithm


(468-68)+(132-132)=400



Simple calculation of 136 * 46 + 132 * 32 + 132


136*46+132*32+132
=132*46+4*46+132*32+132
=132*79+4*46
=132*80-132+184
=10560-132+184
=10612