如何在 Javascript 中创建数学上正确且可接受的除法

Question

对于 exp，代码并不总是创建数学上正确的除法。它创建像 2/0 等这样的除法，它也不接受像“0.33”或“0.33333”这样的“1/3”四舍五入的答案。我需要在代码中更改什么？感谢您的帮助和时间。

document.getElementById("button1").addEventListener("click", question);

var mulDiv = document.getElementById("mulDiv");

function question()
{
var startButton = document.getElementById("button1");
var number1 = document.getElementById("number1");
var number2 = document.getElementById("number2");
var decider = Math.random();
    
button1.textContent = "New Question";
number1.textContent = Math.floor(Math.random()*5);
number2.textContent = Math.floor(Math.random()*5);
    

mulDiv.textContent = "/"  

};

document.getElementById("button2").addEventListener("click", answer);


function answer()
{
var num1 = parseInt(document.getElementById("number1").textContent, 10);
var num2 = parseInt(document.getElementById("number2").textContent, 10);
var answer = parseInt(document.getElementById("userAnswer").value, 10);
var feedBack = document.getElementById("feedBack");
    
     
if (mulDiv.textContent == "/"){
if(answer == num1 / num2) {
feedBack.textContent = "right";

} else {
feedBack.textContent = "wrong";
}
}
       
};

<button id = "button1">
Start
</button>

<p>
<label id = "number1"> </label>
<label id = "mulDiv"> </label>
<label id = "number2"> </label>
 = <input id = "userAnswer" type=text>
<button id = "button2">Answer</button>
</p>

<p id = "feedBack"> </p>

Answer 1

这行代码：

number2.textContent = Math.floor(Math.random()*5);

生成0到4的随机数，因为Math.random()returns是0到1（不包括1）的数。你应该这样做：

number2.textContent = 1 + Math.floor(Math.random()*4);

这样最小值为 1，最大值为 5。

如何在 Javascript 中创建数学上正确且可接受的除法

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