四年级下册数学同步练习-2单元6课时 求近似数-苏教版解析
http://t.cn/Ri466E4苏教版小学数学四年级下册《求近似数》同步练习及参考答案一、迭择1.读50800304这个数时,()A.只读一个零B.只读两个零C.读三个零【考点】整数的读法和写法。【解析】根据整数的读法,从高位到低位,一级一级地读,每一级末尾的0都不读出来,其余数位连续几个0都只读一个零,分别读出各数再作选择。【答案】解:50800304读作:五千零八十万零三百零四。故选:C。【总结】本题考查整数的读法,分级读或借助数位顺序表读能较好地避免读错数中“o”的情况。2.最接近30万的数是( )A.292000B.302000C.300200【考点】整数的改写和近似数。【解析...
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