(三(十十二八万万)四 )
(六十九亿)千
一万 十万 百万 千万 一亿
10000 100000 1000000 10000000 100000000
10倍10倍 10倍
10000倍
1.数一数,填一填。
2.看一看,说一说,一百万粒大米大约有多少?一 千万粒呢?一亿粒呢?
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