题目:
4.012×2.6的积有( )位小数,它们的结果估计比10( ),如果4.012变成4012要使积不变,2.6应变为( )。
答案:
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My name is Wang Hong. My English name is Mona. I am 13 years old. In my family, there are my parents and my brother. My favourite colours are red and yellow. My tel...