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Reach Crest Learning

Count and compare · Lesson 6 of 32

One less

Read with an adult. Take your time. You can say, point, draw or write your answer.

Let's look together

One less means take away just one. The group gets smaller by one.

Say the number you have. Then say the counting number just before it. That number is one less.

012345678910One step back from 5 to 4
Look, point and talk with your adult.

Watch how I do it

I have five blocks. I take one away. Four remain. I move from 5 to 4 on the number line.

Your turn

There are eight blocks. Take one away. How many remain?

Have a go before opening the answer.

Let's check together

Seven. Seven comes just before eight.

Try it away from the page

Start with six objects. Take away one at a time and say how many remain, ending at zero.

Open your writing and drawing pad

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Adult notes · prerequisites, safety and coverage

Prerequisite: one more and counting to ten. Distinguish objects removed from objects remaining.

Use large counters, blocks and paper before symbols. Revisit a lesson until the child can show and explain the idea. Numbers grow from 0–10 to 20, then 100; these pages are not a one-sitting course.

These are teaching introductions, not a claim of mastery. Open the subject's coverage map and limits.