지도서 · Part 2 · 2 / 4

10s and 1s on a number line수직선에서 10과 1로 읽기

Find the nearest 10 first. Then count on or back in 1s.

Step 10워크북 3쪽 →
한국어 요약

두 10 사이에 있는 수를 수직선에서 읽고 놓는 법을 영어로 가르쳐요. 47은 40과 50 사이에 있고 50에 더 가깝다는 생각, 40–50처럼 짧은 선은 시작 수부터 읽는 법, 0부터가 아니라 가까운 10에서 세는 법을 담았어요.

이 주제의 단어betweencloser to
이 주제 차례 (8)

The big idea핵심

Every number lives between two 10s. 47 is between 40 and 50. It is 7 more than 40 and 3 less than 50, so it is closer to 50.

To find a number, go to the nearest 10 first. Then count on (or back) in 1s. Do not start from 0.

Some lines are short, like 40 to 50. Read the first number first. A number line does not always start at 0.

4050A
A is 47: start at 40, then 41, 42 … 47
0102030405060708090100A
47 is between 40 and 50

Get ready준비물

  • The paper number line from Part 1
  • A ruler with centimetres (a ruler is a number line too)
  • Lego towers of 10 and single bricks

Teach it, step by step단계별 수업

YOU 부모가 할 말LIA 아이가 할 만한 대답DO 손으로 할 일

Between two 10s

DOBuild 47: 4 towers of 10 and 7 single bricks.
YOU“Which two 10s is 47 between?”
LIA40 and 50.
YOU“Is it closer to 40 or to 50?”
LIA50. Only 3 more bricks make another 10.

Start at the nearest 10

DOPoint to 80 on the paper line.
YOU“Find 82. Do we start from 0?”
LIANo. Start at 80. 81, 82.
YOU“Now find 89. Which 10 is closer, 80 or 90?”
LIA90. Count back 1: 89.

Counting from the nearest 10 is fast. Counting from 0 is slow and easy to get wrong.

A short line

DODraw a short line. Write 40 at the start and 50 at the end. Draw 9 small marks in between.
DODraw an arrow above the sixth mark.
YOU“What number is the arrow pointing to?”
LIA6?
YOU“Look at the start of the line. What number is it?”
LIA40. Oh, so it is 46!

Ask Lia to read the first number out loud before she counts. Do this on every short line.

Put it on the line

YOU“Draw an arrow to show where 74 goes.”
LIAIt is between 70 and 80. Start at 70: 71, 72, 73, 74. Here.
YOU“Is 74 closer to 70 or to 80?”
LIACloser to 70.
광고

Other ways to say it다른 표현

  • “Which two 10s is it between?”
  • “Is it closer to 40 or to 50?”
  • “Start at the nearest 10.”
  • “Count on in 1s.”
  • “Count back from 50.”
  • “What number does the line start at?”

Worksheet English표현

  • “Complete the number line.”
  • “What number is the arrow pointing to?”
  • “Draw an arrow to show where 74 goes.”
  • “Mark 38 on the number line.”

Good questions to ask좋은 질문

  • “Which two 10s is 37 between?”

    Good answers

    “30 and 40. It is closer to 40.”

  • “Did you start from 0? Is there a quicker way?”

    Good answers

    “I started at 80 because it was the nearest 10.”

  • “What number does this line start at?”

    Note

    Ask it before every short line.

If Lia is stuck막힐 때

  • When

    Lia counts every mark from 0, one by one.

    Cover the start of the line with your hand. “Find the nearest 10 first. Then count on in 1s.”

  • When

    On a line from 40 to 50, she reads the arrow as “6”.

    “Read the first number first. What is it?” Then count on together from 40: 41, 42 … 46.

  • When

    She puts 89 just after 80.

    “Is 89 closer to 80 or to 90?” Show it with bricks: 89 needs only 1 more to make 90.

Game놀이

Game · Big step, small steps

You need: the floor number line from Part 1

  1. Call a number, like 53. Lia jumps to the nearest 10 first (50). Then she takes small steps: 51, 52, 53.
  2. Before she moves, she says which 10 is closer: “53 is closer to 50.”
  3. Swap. Lia calls a number for you. Make a mistake on purpose. Can she catch it?
In the workbook

Short lines in 1s to fill in, arrows to read on longer lines, and two numbers to place exactly.

워크북 3쪽 보기이 주제 인쇄

자주 묻는 질문

40–50 수직선의 화살표를 “6”이라고 읽어요.

선이 0이 아니라 40에서 시작한다는 걸 놓친 거예요. “Read the first number first.”라고 말하고 40부터 41, 42 … 46으로 함께 세어 보세요.

광고