题目内容
找规律填数.
(1)210+220+230+240+250=
______×______=______
(2)320+330+340+350=
______×______=______.
解:(1)210+220+230+240+250,
=230+230+30+230+230,
=230×5,
=1150;
(2)320+330+340+350,
=335+335+335+335,
=335×4,
=1340,
故答案为:230,5,1150,335,4,1340.
分析:把算式变成相同的加数,再根据乘法的意义求解.
点评:本题根据乘法的意义:求几个相同加数和的简便运算进行求解.
=230+230+30+230+230,
=230×5,
=1150;
(2)320+330+340+350,
=335+335+335+335,
=335×4,
=1340,
故答案为:230,5,1150,335,4,1340.
分析:把算式变成相同的加数,再根据乘法的意义求解.
点评:本题根据乘法的意义:求几个相同加数和的简便运算进行求解.
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