지도서 · Part 4 · 5 / 8

Bonds to 100100의 보수

4 + 6 = 10, so 40 + 60 = 100.

Step 4워크북 10쪽 →
한국어 요약

4 + 6 = 10이니 40 + 60 = 100이라는 것, 몇십과 몇십으로 100을 만드는 법을 영어로 가르쳐요. 손가락 하나를 10으로 세는 대본과 10센 동전으로 1링깃을 만드는 놀이를 담았어요.

이 주제의 단어tenstotal
이 주제 차례 (8)

The big idea핵심

100 is 10 tens. So bonds to 100 (with tens) are just bonds to 10, but with tens: 1 + 9 = 10, so 10 + 90 = 100; 4 + 6 = 10, so 40 + 60 = 100. This joins Part 1 (bonds to 10) and Part 3 (related facts).

10101010101010101010
4 tens and 6 tens make 10 tens = 100

Get ready준비물

  • 10 towers of 10 Lego bricks (or 10 bundles of straws)
  • Ten 10 sen coins, and a RM1 coin or note to compare
  • Your ten fingers (each finger can be a ten!)

Teach it, step by step단계별 수업

YOU 부모가 할 말LIA 아이가 할 만한 대답DO 손으로 할 일

How many tens make 100?

DOPut out 10 towers. Count them together in tens: 10, 20, 30 … 100.
YOU“How many towers did we count?”
LIA10.
YOU“So 10 tens make 100.”

Fingers are tens

YOU“Show me 10 fingers. Now each finger is worth 10.”
YOU“Put 4 fingers down. How many tens are down? And how many tens are up?”
LIA4 tens are down. 6 tens are up.
YOU“4 tens is 40. 6 tens is 60. 40 and 60 make 100.”

Money

DOShow ten 10 sen coins.
YOU“Ten 10 sen coins make 100 sen. 100 sen is 1 ringgit.”
YOU“I have 70 sen. How much more do I need to make 1 ringgit?”
LIA30 sen.
YOU“How do you know?”
LIA7 and 3 make 10, so 70 and 30 make 100.

Taking away from 100

YOU“If 40 + 60 = 100, what is 100 − 60?”
LIA40.
YOU“And 100 − 40?”
LIA60.
광고

Other ways to say it다른 표현

  • “What goes with 70 to make 100?”
  • “70 and what make 100?”
  • “How many more to make 100?”
  • “How many tens make 100?”
  • “What is the bond to 100 for 30?”
  • “100 take away 30 is?”
  • “What do I need to add to 20 to get 100?”

Good questions to ask좋은 질문

  • “How many tens are in 100?”

    Note

    10.

  • “Which bond to 10 helps you find 30 + ? = 100?”

    Note

    3 + 7 = 10.

  • “What do you notice about bonds to 10 and bonds to 100?”

    Good answers

    “They are the same, but with tens.”

  • “Is 50 + 50 = 100 true? Why?”

If Lia is stuck막힐 때

  • When

    She says 40 + 60 = 10.

    “10 what? 10 ones or 10 tens?” Build it: 4 towers and 6 towers.

  • When

    She says 30 + 80 = 100.

    Check the small fact: 3 + 8 is not 10. “Which number goes with 3 to make 10?”

  • When

    She tries to count on in ones from 70.

    Say: “Count in tens: 80, 90, 100. How many jumps?”

Game놀이

Game · Race to 1 ringgit

You need: ten 10 sen coins each (or paper coins) and one dice

  1. Take turns to roll the dice. Take that many 10 sen coins. Say how much you have: “I have 40 sen.”
  2. Before each roll, say how much more you need: “I need 60 sen more to make 1 ringgit.”
  3. If your roll takes you past 100 sen, you miss that turn. The first player to make exactly 100 sen (1 ringgit) wins.

Extra challenge더 도전

  • Bonds to 100 with ones (Year 3 work, only if she finds it easy): 35 + 65 = 100. Hint: “The ones make 10, and the tens make 90.”
  • Three tens numbers that make 100: 20 + 30 + 50.
  • Bonds to 1000: 400 + 600 = 1000.
In the workbook

Bars of tens, missing numbers, and two stories.

워크북 10쪽 보기이 주제 인쇄

자주 묻는 질문

bonds to 100은 무엇인가요?

더해서 100이 되는 두 수예요. Year 2에서는 30과 70처럼 몇십끼리 먼저 해요.

10의 보수와 무슨 관계인가요?

10의 보수에 tens를 붙이면 돼요. 3 + 7 = 10이니 3 tens + 7 tens = 10 tens, 곧 100이에요.

광고