看图填空． 15里面有_1个5．的个数是的_2倍．_刷题宝

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看图填空．

15里面有____个5．的个数是的____倍．

上一题下一题 0.0难度选择题更新时间:2019-09-24 07:54:22

答案(点此获取答案解析）

3,3

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把15×4=60，360﹣60=300，300÷15=20写成一道综合算式是____．

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The Volleyball Club

The school volleyball club wants new members! We have good players from the school team. They can help you enjoy the game. We practise for an hour every afternoon from Wednesday to Friday.

Go to your PE teacher and buy sports shoes if you want to be with us.

Girls' Volleyball Match

Team: No.1 Middle School vs No. 2 Middle School

Time: 2:30 p.m.—4:30 p.m., October 21st

Place: Xuzhou Sports Centre

Come for our school team. We have twenty tickets (票) for every class. Go to your PE teacher for the tickets before Friday.

Please wear your school uniform (校服) at the sports centre.

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\vec{a}

\vec{b}

是两个互相垂直的单位向量，且

\vec{c}

\vec{a}

\vec{c}

\vec{b}

=1，则对任意的正实数t，|

\vec{c}

\vec{a}

\frac{1}{t} \vec{b}

|的最小值是（）

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