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Ten more
Discover Mathematics: Chapter 4
GoalFind ten more than a number from 1 to 9 by adding a full ten, and write the answer.
New words
ten more · the number we get when we add a full tenfull ten · a ten-frame with every square filledanswer · the number we find
Explanation
To find ten more than a number, start with a full ten-frame and put the number on a second frame. Ten more than 4 is 14: one full frame and 4 counters. Ten more than 5 is 15. Ten more than 9 is 19. The digit on the right does not change, and a 1 appears on the left. That 1 is the extra ten.
Worked examples
Ten more than 3: a full frame and 3 counters make 13.
Salma has 8 oranges and her aunt brings 10 more. Ten more than 8 is 18.
Nour has 2 cupcakes and gets 10 more. Ten more than 2 is 12.
Class activity
Ten more. Put out 6 pebbles. Count out 10 more pebbles into a bowl and pour them in. Count all of them together: 16. Now start with 7 pebbles and add 10 more: 17. Try other starting numbers up to 9.
Practice
1
There are 7 apples and 10 more apples. How many apples are there in all?
17
2
How many counters are on the two ten-frames? It is ten more than which number?
15. It is ten more than 5.
3
What is 10 more than 9?
19
4
Ten more than a number is 14. What is the number?
4
5
Mariam has 4 stickers and gets 10 more. How many stickers does she have?
14