• 1. 竖式计算

  ①28+54=

  ②70–25=

  ③49–25=

  ④72+17=

  ⑤36+57=

  ⑥65–47=

  ⑦68+29=

  ⑧92–46=

  ⑨72–57+16=

  ⑩36+54–29=