一 找规律，填一填。
1. two, four, six, , ten, twelve, , sixteen
2. one, four, , ten, thirteen
3. three, two, five, two, seven, two, nine, two, eleven, two, thirteen, two, fifteen, two,

1. eight; fourteen
2. seven
3. seventeen

二 计算小达人。
1 five+eight=
2 sixteen-five=
3 three×five=
4 two×six=
5 twenty-eight=
6 two×nine=
7 four×five=
8 nineteen-two=
9 one+fifteen=
10 twelve+nine=

1. thirteen
2. eleven
3. fifteen
4. twelve
5. twelve
6. eighteen
7. twenty
8. seventeen
9. sixteen
10. twenty-one

小朋友们去动物园参观，看看他们都看到了哪些动物。快来读一读，先完成填空，再来和小伙伴们演一演。
A: Let’s go to the zoo.
B&C: Good idea!
B: The zoo is so big.
C: Yes. Look! There are many tigers.
（指着远处人群围着的地方。）
A: Tigers.

三年级下册
B: Oh, big tigers. They have big mouths.
C: How many tigers do you see?
A: 1, 2, 3... I see twelve.
B: Wow, twelve tigers.
A: Do you like tigers?
C: No, I don’t. I like monkeys.
B: I like monkeys, too. Let’s go and have a look.
A&C: Great!
A: Wow, so many monkeys. How many monkeys do you see?
B: 1, 2, 3... 1, 2...（猴子跳来跳去数不清楚。）I see eleven... twelve. I see twelve.
C: No, no, no. I see eleven.
B: I see twelve.
C: I see eleven monkeys.
B: I see twelve monkeys.


填空：他们看到的动物有，分别有只和只。

老虎和猴子 12 12