Spread one bankroll across several horses or exacta combos so win profits are a similar amount on whichever one comes in. Shorter odds get a bigger bet, longer odds a smaller one.
Tote odds and probables keep moving until the gates open, and your own bets move them too. Re-check your numbers right before post.
$12.50 on the 2-1 · $7.50 on the 4-1
Either one wins and you collect $37.50.
$15.88 · $10.59 · $7.06 = $33.53
Any of the three wins and you collect $63.53.
2-1 over 4-1 · 4-1 over 2-1
Payouts start as estimates from the win odds. Type in the tote board probables and the bets adjust so either combo returns about the same.