Children in preschool intends to disk addition and subtraction how to play

The intention of the disk has a mnemonic:

1, the addition of mnemonic table: not into the place of plus into the place of plus, straight plus full of five plus into ten plus broken five into ten plus. Plus one: one on one, one down five to four, one to nine into one, plus two: two on two, two down five to three, two to eight into one, plus three: three on three, three down five to two, three to seven into one.

2, plus four: four on four, four down five go one, four go six into one, plus five: five on five, five go five into one, plus six: six on six, six go four into one, six go one go five into one, plus seven: seven on seven, seven go three into one, seven go two go five into one, plus eight: eight on eight, eight go two go one, eight go three go five into one, plus nine: nine on nine, nine go one go one, nine go four go five into one.

3, subtraction mnemonic table: non-recession of the reduction of the reduction, direct reduction of the five reduction of the reduction of the reduction of the reduction of ten to make up for the reduction of the five. Minus one: one down one, one on four go five, one back one also nine, minus two: two down two, two on three go five, two back one also eight, minus three: three down three, three on two go five, three back one also seven, minus four: four down four, four on one go five, four back one also six.