直接写出得数.40×1.5= = 3.1+4.67= 0.0096×1000= =72÷1.2+72÷1.8= 7×5÷7×5= = = 2004×19﹣2004×18﹣2004=
km的一半是多少千米?
= = == = =
= 12×= = =×24= ×= ×= ×=
列式计算.(1)米的是多少米?(2)吨的是多少吨?
计算下面各题,再观察每组题目和结果,你有什么发现?