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1:一个书包25元,买4个要多少钱?,254,“254”表示4个25是多少?,2:一盒彩笔2元,买10盒要多少钱?,210,“210”表示10个2是多少?,口答算式意义,135,20 7,2003,3006,照样子写,如:2+2+2+2=8可以写成 24=8那 么:0.2+0.2+0.2+0.2=0.8可以写成 0.24=0.8,买文具,文 具 店3号柜,买4块 要多少钱?,0.2元,0.2元,0.2元,0.2元,0.8,0.2,+,0.2+0.2+0.2+0.2=,0.2,0.2,0.8(元),0.2,0.24=?,0.2元=2角,24=8(角),8角=0.8元,0.24=0.8(元),做一件儿童服装用布0.3米,做这样的3套衣服需要布料多少米?,0.33=?,涂一涂,填一填。,0.0110=(),0.1,涂一涂,填一填。,0.0150=(),0.5,涂一涂,填一填。,0.01100=(),1,加油哦!,0.123,0.242,0.43,0.33,0.5,0.1,做一做,6,0.6,24,2.4,1个日记本0.8元,丁丁要买3个这样的日记本,需要多少钱呢?,三,解决问题,1,一支铅笔0.2元,小丽买了6支送给幼儿园的小妹妹,她一共花了多少钱?,2,一种果汁,每瓶售价1.2元.小明一下买了3瓶,一共需要多少钱?如果买10瓶呢?,