shu ping guo七、数苹果。cong zuo wang you shu dike he dike he...
cong you wang zuǒ shǔ dike he dike he qi lai you ge ping guo(2)从右往左数,第()棵和第()棵合起来有9个苹果。 2ián yi tián3.填一填。cong zuo wang you shǔ dike he dike he qi lai you ge ping guo(1)从左往右数,第()棵和第()棵合起来有8个苹果。cong you wang zuo shu ...