問題文全文(内容文)：
x=?
＊図は動画内参照

問題文全文(内容文)：
三角形の面積は？
＊図は動画内参照

2021年度全国学力テスト小6算数

問題文全文(内容文)：
$\begin{eqnarray}
\left\{
\begin{array}{l}
2019x+2020y=66 \\
1009x+1011y=33
\end{array}
\right.
\end{eqnarray}$
これを解け.

問題文全文(内容文)：
Let's enjoy oriental mathematics for just a little while.
You will discover a cute world from mathematics.
Everyone in the world should love and be good at mathematics.

We are introducing the entrance exam questions for Japanese high schools.
It's an important issue for you to understand the basics of mathematics.
Would you like to solve this math problem and check out our commentary?