5以内口算

５＋０＝２－１＝３＋１＝５＋０＝２－１＝３＋１＝４－２＝５－３＝３－３＝４－２＝５－３＝３－３＝２＋０＝１－１＝３＋２＝２＋０＝１－１＝３＋２＝５－５＝５－１＝２＋２＝５－５＝５－１＝２＋２＝４＋０＝