3712+3788 = 37(12+88) = 37100 = 37003712-372 = 37(12-2) = 3710 = 370289+229 = 9(28+22) = 950 = 450189+181 = 18(9+1) = 1810 = 18010117-17 = 17(101-1) = 17100 = 170035673+64427+73644+27356 = (356+644)(73+27) = 1000*100 = 100000
3712+3788 = 37(12+88) = 37100 = 3700
3712-372 = 37(12-2) = 3710 = 370
289+229 = 9(28+22) = 950 = 450
189+181 = 18(9+1) = 1810 = 180
10117-17 = 17(101-1) = 17100 = 1700
35673+64427+73644+27356 = (356+644)(73+27) = 1000*100 = 100000