第16页 - 苏教版数学补充习题五年级上下册答案

$\begin{aligned}解：41x &=123\\x& =123÷41\\x &=3\end{aligned}$

$\begin{aligned}解：2x&=10.8\\x&=10.8÷2\\x&=5.4\end{aligned}$

$\begin{aligned}解：2x+0.4 &=10\\2x&=10-0.4\\2x& =9.6\\x &=4.8\end{aligned}$

$\begin{aligned}解：4x + 9.6&=36\\4x &=36 - 9.6\\4x&=26.4\\x&=6.6\end{aligned}$

$\begin{aligned}解：8x-8 &=32\\8x& =32+8\\8x &=40\\x &=5\end{aligned}$

$\begin{aligned}解：6x+47 &=95\\6x& =95-47\\6x &=48\\x &=8\end{aligned}$

$解 ∶ 设食堂平均每天用大米x千克$

$\begin{aligned}5 x+120&=500\\5 x&=380\\x&=76\end{aligned}$

$答：食堂平均每天用大米76千克。$

$解 ∶ 设这块三角形菜地的底是 x 米$

$\begin{aligned}20 x÷2&=80\\20 x&=160\\x&=8\end{aligned}$

$答：这块三角形菜地的底是8米。$