To progress the children's understanding of number, we have been asking them to solve word problems.
Example:
I have collected 56 cards. There are 100 in the set. How many more do I need to collect? ____
Method 1- mental
Start on 56. Add 4 to get to the next 10 which is 60. Add 40 to get to 100. Add the numbers together.
Number sentence to show working out:
56+4=60
60+40=100
40+4=44 cards
Method 2- written
Draw a number line with 56 on the left end and 100 on the right end. Add on 4 to 56 to get to 60, add on 40 to get to 100.
Example:
I have collected 56 cards. There are 100 in the set. How many more do I need to collect? ____
Method 1- mental
Start on 56. Add 4 to get to the next 10 which is 60. Add 40 to get to 100. Add the numbers together.
Number sentence to show working out:
56+4=60
60+40=100
40+4=44 cards
Method 2- written
Draw a number line with 56 on the left end and 100 on the right end. Add on 4 to 56 to get to 60, add on 40 to get to 100.