1st Grade Mathematics — God's Numbers — Addition and Subtraction
Students will practice subtraction with numbers up to 20 and connect sharing with subtraction.
The early church shared everything they had. When we share, we can use subtraction to figure out how much is left.
Let's subtract bigger numbers. 15 - 5 = 10. 18 - 9 = 9. 14 - 6 = 8. To subtract, count back from the bigger number.
Here is a trick: to find 13 - 5, start at 13 and count back 5: 12, 11, 10, 9, 8. So 13 - 5 = 8!
Imagine you have 20 stickers to share with friends. Write subtraction sentences as you give stickers away. How many are left after giving 4 away? After giving 7 more? Draw pictures to show your work.