(1)苹果和桃一共有几个?列式:□○□=□ 答:苹果和桃一共有 个.(2)请你提一个减法的数学问题,并解答.问题: ;列式:□○□=□ .
直接写得数4÷= 0×= ÷= ×1.4= ×=0÷= ×10= 30×0.05=
直接写出得数.= = = == = = =
口算.4.2÷= ×3= ÷5= (+)×72=×12= ×1.8= ÷=
= = = == = = =
直接写出得出.20×= ÷= ×= +=÷6= ×12= += 6÷=﹣= ×= ×= 0÷=