D.U. 1: Numbers until 4 digits

D.U. 1: Numbers until 4 digits

1. Units, tens, hundreds and thousand units.

   • A 4 digit number has thousands, hundreds, tens and units
     • A 3 digit number has hundreds, tens and units
       • A 2 digit number has tens and units
   • A thousand has 10 hundreds or 100 tens or 1000 units
     • A hundred has 10 tens or 100 units
       • A ten has 10 units

2. Decomposition and composition of natural numbers

   • We can represent a number in different ways
     • 2418 =
     • 2418 = 2000 + 400 + 10 + 8
     • 2418 = 2Th + 4H + 1T + 8U

3. Comparison and order of natural numbers

   • To compare two numbers with the same number of digits, we have to compare digit by digit starting by the digit situated on the left.

4. Representation of natural numbers on the number line.

5. Ordinal numbers

   • Indicate order and position

6. Rounding natural numbers until the hundreds and thousands.

7. Name and spelling of the numbers

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