Unit 3 How do we use numbers？ Explore（讲义）-2025-2026学年沪教版英语四年级上册

Unit 3 How do we use numbers? ⭐Explore知识点清单 一、核心词汇 1. 数字与数学类 · 数学运算：plus（加，+）、minus（减，-）、equal（等于，=） · 数字分类：odd numbers（奇数，1,3,5,7,9…）、even numbers（偶数，2,4,6,8,10…） · 功能动词：count（数数） · 疑问词：how many（多少，用于可数名词提问） 2. 物品与生活类 · 文具：pencil（铅笔）、book（书）、ruler（尺子）、pen（钢笔） · 食物：apple（苹果） · 其他：every day（每天）、together（一起）、party（派对） 二、核心句型 1. 数字分类与功能 · Some numbers are even, and some numbers are odd.（有些数字是偶数，有些是奇数。） · We use numbers every day. They help us count things.（我们每天都用数字，它们帮我们数数。） 2. 加减运算表达（口语 + 书写对应） · 加法： 口语：Five plus six equals eleven. 书写：5 + 6 = 11 场景：You have five orange pencils. I have six green pencils. How many pencils do we have? We have eleven pencils. · 减法： 口语：Five minus one equals four. 书写：5 - 1 = 4 场景：You have five apples. Your sister eats one. Now how many apples do you have? I have four apples now. 3. 数量问答句型（How many 专项） · 提问：How many + 可数名词复数 + do you have?（你有多少……？） 例：How many books do you have? / How many pencils do you have? · 回答：I have + 数字 + 名词. / I don't have + 名词. 例：I have three books. / I don't have ten apples. · 拓展：We have + 数字 + 名词. / They don't have + 数字 + 名词. 例：We have ten apples. / They don't have ten apples. They have two. 三、语法知识点 1. 数词基础 · 掌握 1-20 基数词的拼写、发音、认读，能对应阿拉伯数字。 · 区分奇数（odd）和偶数（even）： · 偶数：能被 2 整除（2,4,6,8,10,12…20） · 奇数：不能被 2 整除（1,3,5,7,9,11…19） 2. 加减运算的英语表达 · 固定结构：数字 + plus/minus + 数字 + equals + 结果，对应数学算式。 3. How many 句型 · 用法：只能用于可数名词复数的数量提问，后接名词复数形式（apples, books, pencils 等）。 4. 否定句与缩写 · 助动词 do 的否定：do not → don't 例：I don't have ten apples. / They don't have ten apples. 5. 主谓一致 · 第一人称（I/we）、第二人称（you）、复数主语（they）后用动词原形have；第三人称单数用has（本单元以have为主）。 ⭐Explore同步练 一、选词填空（每空 3 分，共 30 分） 从方框中选择合适的单词，补全句子，每词限用一次。 plus, minus, equal, odd, even, count, don't, have, how many, eleven 1. 1, 3, 5, 7, 9 are ______ numbers. 2, 4, 6, 8, 10 are ______ numbers. 2. We use numbers to ______ things every day. 3. Five ______ six equals ______. (5 + 6 = 11) 4. Five ______ one equals four. (5 - 1 = 4) 5. Ten plus two ______ twelve. (10 + 2 = 12) 6. —______ apples do you have? —I ______ three apples. 7. I ______ have ten apples. I have four apples. 二、单项选择（每题 4 分，共 20 分） ( ) 1. —How many pencils do we have? —You have 5, I have 6. We have ______ pencils. A. 10 B. 11 C. 12 ( ) 2. Which of the following is an odd number? A. 8 B. 12 C. 13 ( ) 3. We say "Five minus one equals four". We write ______. A. 5 + 1 = 4 B. 5 - 1 = 4 C. 1 - 5 = 4 ( ) 4. —How many books do you have? —______ A. I have three books. B. I don't have three books. C. Yes, I have. ( ) 5. "do not" 的缩写是 ______ A. don't B. doesn't C. do't 三、情景交际（每题 5 分，共 20 分） 从方框中选择合适的句子，补全对话，每句限用一次。 A. Five plus six equals eleven. B. I have four apples. C. How many pencils do you have? D. It's an odd number. 1. —What's 5 plus 6? —______ 2. —Is 7 an even number? —No, it isn't. ______ 3. —How many apples do you have? —I don't have ten apples. ______ 4. —______ —I have seven pencils. 四、课文填空（每空 3 分，共 30 分） 根据课文内容，补全短文，每空一词。 Look at the numbers. Some numbers are ______, and some numbers are . The even numbers are blue, and the ______ numbers are red. We use numbers every day. They help us ______ things. You have five orange pencils. I have six green pencils. ______ many pencils do we have? We say, "Five ______ six equals eleven." We write 5 + 6 = 11. You have five apples. Your sister eats one apple. Now how many apples do you have? We say, "Five ______ one equals four." We write 5 - 1 = 4. —_______ many books do you have? —I ______ three books. / I ______ have ten books. 参考答案 一、选词填空 1. odd; even 2. count 3. plus; eleven 4. minus 5. equals 6. How many; have 7. don't 二、单项选择 1. B 2. C 3. B 4. A 5. A 三、情景交际 1. A 2. D 3. B 4. C 四、课文填空 1. even 2. odd 3. odd 4. count 5. How 6. plus 7. minus 8. How 9. have 10. don't 学科网（北京）股份有限公司 $