• 1. (2020二上·巴彦淖尔期中) 用竖式计算。

  ①18+67 =

  ②71-24 =

  ③60-35 =

  ④32+26 =

  ⑤52+38-36 =

  ⑥93-56-27 =

  ⑦86-（28+39）=

  ⑧49+31+16 =