1
Review: counting and comparing
Discover Mathematics: Chapters 1–7
GoalCount up to 20, compare two groups, and tell what is the same and what is different.
New words
count · touch each thing once and say the numbers in ordermore · a bigger number of thingsfewer · a smaller number of thingssame · alike in some way
Explanation
Let us remember how to count. Touch each thing once and say the numbers in order. The last number tells how many. A ten-frame helps: a full frame is 10, and the dots after it are the extra ones. To compare two groups, we find out which has more, which has fewer, or whether they are the same. We can also compare things by size, shape and colour.
Worked examples
The ten-frames show 1 full ten and 6 more dots, so the number is 16.
Mayar sees 7 camels and 4 donkeys. She matches them. There are 3 more camels than donkeys.
A football and an orange are both round, so their shape is the same. A pencil is long and thin, so it is different.
Class activity
Counting hunt. Ask the child to find and count things in one room, such as chairs, windows, books and cups. Make a list of what was counted. Then say which thing there is most of and which there is least.
Practice
1
How many bees are there?
14
2
Look at the ten-frames. What number do they show?
15
3
Which group has fewer kites, the left or the right?
The right group (5 kites, and the left has 8)
4
Which two things are yellow?
The banana and the lemon
5
Which number comes between 11 and 13?
12