笔算下列各题,其中带“△”的要验算.①362+579= ②45÷8 ③73÷9④527﹣398 ⑤1000﹣427 ⑥629+718⑦△880﹣407 ⑧80÷9 ⑨△328+954.
直接写得数.+= ﹣= 0.2﹣=+= ﹣= +2÷9=2﹣﹣= 1.55﹣= 1﹣﹣+=0.5﹣﹣=
计算.= = == = 1﹣== =
看图计算下面各题.+= +=
计算下列各题:= = == = == =
观察下面各式,算一算,你能发现什么规律?+= += +=×= ×= ×=