Back to: Mathematics Primary 1
Hello children, welcome back to class
SUBTOPIC: ADDITION OF WHOLE NUMBERS WITH SUM LESS THAN 20
In the last lessons in addition we have learnt that when two things and four things are taken together, they make six things. The two things and four things are then said to be added together. Thus, two and four added together make six.
In numeracy this is written in a short way as follow:
2 + 4 = 6
The sign or symbol + is called the plus sign and means that the numbers 2 and 4 on either side of it are to be added together.
The sign or symbol = means ‘are’ or ‘is equal to’. Here it tells us that when the numbers 2 and 4 are added together we get 6.
We may read 2 + 4 = 6 as ‘two and four are six’ or we can also say ‘two plus four is equal to six’.
Zero: If you have no chocolates at all, you have zero chocolates.
Zero is written like this 0 and means not any or nothing. If you add 5 to 0, it is still 5. If you add 0 to any number the sum is the same as the number itself.
In today’s lesson let’s add numbers to give us a sum greater than 10 but less than 20.
Bring out 20 counter.
Examples
- 7 + 4 = 11 7
/////// + //// = /////////// + 4
11
ACTIVITY
- i) 8 + 5 =
- ii) 10 + 7 =
iii) 9 + 4 =
- iv) 18 + 1 =
- v) 12 + 7 =
- vi) 6 + 11 =
MORE ACTIVITY
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