可填 题目数量 数字范围 计算符号
题目做完后会弹窗提示正确率、用时
效果图 源代码在图片后面
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<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>数学计算练习</title><style>body {font-family: Arial, sans-serif;background-color: #f2f2f2;}.container {max-width: 400px;margin: 50px auto;background-color: #fff;padding: 20px;border-radius: 10px;box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);}h2 {text-align: center;margin-bottom: 20px;color: #ff4646;}input, select, button {display: block;width: 100%;margin-bottom: 10px;padding: 10px;border: none;border-radius: 5px;}button {background-color: #ff4646;color: #fff;cursor: pointer;}button:hover {background-color: #ff1f1f;}</style>
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<body><div class="container"><h2>数学计算练习</h2><input type="number" id="numOfQuestions" placeholder="输入题目数量"><input type="number" id="minNumber" placeholder="输入数字范围最小值"><input type="number" id="maxNumber" placeholder="输入数字范围最大值"><select id="operation"><option value="add">加法</option><option value="subtract">减法</option><option value="multiply">乘法</option><option value="divide">除法</option></select><button onclick="startQuiz()">开始练习</button></div><script>function startQuiz() {var numOfQuestions = document.getElementById('numOfQuestions').value;var minNumber = document.getElementById('minNumber').value;var maxNumber = document.getElementById('maxNumber').value;var operation = document.getElementById('operation').value;var correctAnswers = 0;var startTime = new Date().getTime();for (var i = 0; i < numOfQuestions; i++) {var num1 = Math.floor(Math.random() * (maxNumber - minNumber + 1)) + parseInt(minNumber);var num2 = Math.floor(Math.random() * (maxNumber - minNumber + 1)) + parseInt(minNumber);var question, answer;switch (operation) {case 'add':question = num1 + ' + ' + num2;answer = num1 + num2;break;case 'subtract':question = num1 + ' - ' + num2;answer = num1 - num2;break;case 'multiply':question = num1 + ' * ' + num2;answer = num1 * num2;break;case 'divide':if (num2 === 0) {continue;}question = num1 + ' ÷ ' + num2;answer = num1 / num2;break;}var userAnswer = prompt('第' + (i+1) + '题: ' + question + ' = ?');if (userAnswer && parseFloat(userAnswer) === answer) {correctAnswers++;}}var endTime = new Date().getTime();var totalTime = (endTime - startTime) / 1000;var accuracy = (correctAnswers / numOfQuestions) * 100;alert('练习结束，正确率：' + accuracy.toFixed(2) + '%，用时：' + totalTime.toFixed(2) + '秒');}</script>
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