Intermediate
40 mins
Teacher/Student led
+65 XP
Teacher-led from the board. Pupils do not need a device, but can follow on one.

Building Any Number to 99: Tens and Units Together

You will build two-digit numbers with rods and units on a place-value mat. Practise saying how many tens and units make numbers such as 34 or 52, and see what zero means in the units place.

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    Place value blocks
    Place value blocks

    1 - Getting Started ~3 mins

    Illustration for Getting StartedThe school noticeboard says 86 pupils were in school today. Eighty-six! Could we build that with ten-rods and unit cubes? How many tens would we need?

    2 - Watch and Notice ~7 mins

    On our place-value mat, the left column is tens (the ten-rods) and the right column is units (the loose cubes). Four numbers to watch. For each one, read the tens and the units, then say how many rods and how many loose cubes make that number.

    Watch the last one carefully. What is the zero doing?

    3 - Try It Together ~7 mins

    We will build numbers the teacher calls on the place-value mat. First we all say how many tens and how many units. Then one pupil builds on the board. We all agree or help fix it.

    Build the number

    4 - Draw 34 in Your Copy ~5 mins

    COPYBOOK MOMENT

    On your Tens and units grid, draw three ten-rods and four unit cubes for 34. Write 34 underneath.

    5 - Class Challenge ~8 mins

    Together we work through 23 → 45 → 70 → 87. For each number, we all say how many tens and how many units. Then one pupil builds it on the board and we check.

    Build these numbers

    Pupil practice
    Module 4 · Place Value: Tens and Units to 99 Number
    Lesson 42 · Building Any Number to 99: Tens and Units Together
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