지도서 · Part 4–6 · 2 / 3

Count on and back from any number아무 수에서 10씩, 거꾸로 뛰어 세기

Start at your number. Keep the same jump. Forwards or back!

Step 15워크북 5–7쪽 →
한국어 요약

0이 아닌 수에서 10씩 세기(23, 33, 43)와 2씩·5씩·10씩 거꾸로 세기를 영어로 가르쳐요. 수 배열표에서 10 더하면 쭉 아래로 가는 규칙, 23에서 30으로 건너뛰는 실수를 바로잡는 대본, "Will you say 15?"를 규칙으로 따지는 질문을 담았어요.

이 주제의 단어ones digithundred squarepattern
이 주제 차례 (9)

The big idea핵심

Counting does not always start at 0. Start at your number. Keep the same jump. Forwards or back!

Ten more is straight down on a hundred square. The ones digit stays the same: 23, 33, 43, 53. Ten less is straight up.

When you count back, the start is not a jump. Back in 5s from 30: 25, 20, 15. Three jumps, and we land on 15.

Will you say it? Count near the number, then check with the pattern. Counting in 2s from 0, the numbers end in 0, 2, 4, 6 or 8. So you will not say 15. Always say where the count starts: from 1, counting in 2s does say 15.

1015202530−5−5−5
Back in 5s from 30: 25, 20, 15
23334353
10 more each time. The ones digit stays 3.

Get ready준비물

  • A hundred square (printed or drawn)
  • A small toy or counter to slide on it
  • A paper number line from 0 to 50
  • Sticky notes

Teach it, step by step단계별 수업

YOU 부모가 할 말CHILD 아이가 할 만한 대답DO 손으로 할 일

Count back

DODraw a line from 0 to 30 with a mark every 5. Put a toy on 30.
YOU“Count back in 5s from 30. Is 30 a jump?”
CHILDNo. 30 is the start. It’s not a jump.
CHILD25, 20, 15.
YOU“Three jumps back. Where did we land?”
CHILD15.

Some children say the start number as the first jump. Jump first, then say the number.

Ten more is straight down

DOPut the toy on 23 on the hundred square.
YOU“Count in 10s from 23. Where is 10 more?”
CHILDStraight down. 33.
YOU“And again?”
CHILD43, 53. The ones digit stays 3.

Catch the jump to the tens

YOU“Watch me. 23, 30, 40, 50.”
CHILDWait! 23 to 30 is only 7. That is not 10 more.
YOU“Show me on the hundred square.”
CHILDTen more is straight down. 23, 33, 43, 53.

Children who love round numbers often jump to the next ten. Slide a finger straight down to check.

Back in 10s

YOU“Now count back in 10s from 53.”
CHILDStraight up! 43, 33, 23.

Will you say it?

YOU“Count in 2s from 0. Will you say 15?”
CHILDNo. 12, 14, 16. I jump over 15.
YOU“How do you know?”
CHILDI know because from 0, 2s never end in 5.

A yes or no answer can be a lucky guess. Always ask “How do you know?”

광고

Other ways to say it다른 표현

  • “Count on in 10s from 23.”
  • “Count back in 5s from 50.”
  • “Start at 37 and count in 10s.”
  • “What comes next?”
  • “Will you say 15?”
  • “Ten more is straight down.”
  • “Ten less is straight up.”

Worksheet English표현

  • “Count back in 2s. Fill in the missing numbers.”
  • “Count on in 10s from 46.”
  • “Will she say 15? Explain how you know.”
  • “Is he right? Explain your answer.”

Good questions to ask좋은 질문

  • “Where does the count start? Is the start a jump?”

    Note

    The start is where you stand. The first jump lands on the next number.

  • “What stays the same when you count in 10s from 23?”

    Good answers

    “The ones digit. It stays 3.”

  • “Will you say 15 counting in 2s from 0? How do you know?”

    Good answers

    “No. From 0, 2s end in 0, 2, 4, 6 or 8.”

  • “Can you count back the same way?”

    Note

    Ten more is straight down. Ten less is straight up.

If Lia is stuck막힐 때

  • When

    From 23 in 10s, she says 23, 30, 40, 50.

    “Ten more is straight down.” Slide down from 23 on the hundred square: 33, 43, 53.

  • When

    Counting back, she says the start number as the first jump.

    “30 is the start. It is not a jump.” Jump first, then say the number.

  • When

    Going back across a ten is hard: 32, 30, 29.

    Count forwards on the same numbers first, then back. Every jump on the number line is the same size.

  • When

    She says “yes” to every “Will you say …?” question.

    Count near the number together: “12, 14, 16. Did we say 15?”

Game놀이

Game · Hundred square slide

You need: a hundred square, a small toy

  1. Put the toy on any number, like 37. Lia slides it straight down and says 47, 57, 67.
  2. Then straight up: 57, 47, 37.
  3. Swap. You count, and jump to the tens on purpose: 37, 40, 50. Can she catch it?

Extra challenge더 도전

  • Count back in 10s from 98. What stays the same?
  • Count in 5s from 3: 3, 8, 13, 18 … What pattern do you see?
  • Will you say 50 if you count in 5s from 2? How do you know?
In the workbook

Count back in 2s, 5s and 10s, count in 10s from any number on a hundred square, and answer “Will you say it?”. Then fix a friend’s count.

워크북 5–7쪽 보기이 주제 인쇄
태블릿으로 연습Play Number Games: 2s, 5s and 10s
열기 ▶

자주 묻는 질문

23에서 10씩 셀 때 23, 30, 40이라고 해요.

몇십으로 건너뛴 거예요. 23에서 30은 7밖에 안 돼요. 수 배열표에서 23을 짚고 한 칸씩 아래로 33, 43, 53 — 일의 자리 3이 그대로라는 걸 보여 주세요.

0부터 2씩 세면 15를 말할까요?

아니요. 0부터 2씩 세면 끝자리가 0, 2, 4, 6, 8뿐이라 14 다음은 16이에요. 출발 수가 1이면 달라지니 “from zero”를 꼭 붙여 물어요.

광고