1. Subtract sizes-68 + 471. Subtract sizes68 - 47 = 21.168 - 47 = 212larger sign wins3answer -2168 - 47 = 21.68 - 47 = 21.
2. Keep larger sign-68 + 472. Keep larger signlarger sign wins.168 - 47 = 212larger sign wins3answer -21larger sign wins.larger sign wins.
3. Read answer-68 + 473. Read answeranswer -21. Read answer answer -21answer -21.answer -21.answer -21.