32 Ch32-各科目的基本表达

Chapter 32 Look at all these letters of the alphabet! Let's sing the alphabet song together. Each letter has a different sound.

When we put some letters together, we can make words. See? I have a"c", "a", and "t". What is this? It's "CAT." t, t, t... The letter "t" sounds like / t /. How does the letter "a" sound? Let's listen to a short "a" sound. I'll say a long "a," and you say it after me. What letter should come between c and "t" to make "cat"? If we change the "c" to "b", what word do we have? It's "BAT." Let's read the word on the back of the card. Let's find the word with the / ae / sound from the cards. Sometimes two letters make just one sound. The "s" and "h" make a/ f/ sound like in "ship." But this single letter has two different sounds.

The letter "g" sounds like the / g / in "go" or the / 3 / in "gel." When "k" comes before "n," it is silent. Look for the words that begin with the same sound. Let's look for the word that starts with an / e / sound. Why don't you look for some words that rhyme with each other? What's 3 plus 2? 3 plus 2 equals 5. Look! 2 more birds came. How many birds are there in all? There were 3 birds already. So there are 5 birds all together. If we write it in a number sentence, it's 3+2=5. 5 is 2 more than 3.

What's 5 minus 2? 5 minus 2 equals 3. There were 5 birds, but 3 birds flew away. How many birds are left? I'll take away 3from 5. 2 birds are left now take away Let's write it in a number sentence. It's 5-3=2. I took away 2 apples from 5 apples. How many are left? I will give you three more apples. How many do you have now? By what number is 2 smaller than 5? What is 3 less than 5? 2 is 3 less than 5. What's 3 times 2? Read this multiplication sentence. 3 times 2 equals 6. I have 2 sets of 3 pencils. How many pencils do I have?

6 pencils. It's the same as 3 plus 3. What's 6 divided by 2? Read this division sentence. 6 divided by 2 equals 3. Two kids will share 6 pencils equally. How many pencils can each have? Each kid can have 3 pencils because 6 is divided by 2.

If 1 is equally divided by 3, each part is called one third. It's read one fourth. Is it smaller than I? Let's cut this bread into 3 pieces. What do you call one piece? One part is one third. The fraction sentence looks like this. It's three fifths. It's midday. How do you know that? Because the sun is in the sky. The sun gives us light and heat. Without the sun, no living things could live. It's dark at night. What do you see in the sky?