*Math war with a deck of cards (split into two piles; give values to the ace, jack, king, queen, joker or eliminate them; flip the two top cards and add or subtract; make a pile with the correct answers or play with a partner and the person who solves first gets the cards)

*oral or written "quiz" with a few problems each night

*an adult supervised app or computer website

*use a calculator to say the problems as you enter them...try three times with the calculator and once by memory

*rock, paper, scissor....add