In this unit, the students will develop strategies for adding and subtracting whole numbers by using addition charts, mental math, estimation, base ten blocks, place value mats, as well as the standard algorithms using pencil and paper.
The ability to use a variety of strategies to add and subtract leads to the development of a strong sense of number. Numbers are all around us and the skills taught in this unit are essential for daily living.
To help your son/daughter completing daily review of number facts goes a long way! Practicing the concepts of "borrowing" (when subtracting) and "carrying over" (when adding) will help him/her to remember these strategies.
Students should become aware of Related Facts. These are 3 numbers that can be used to make 2 addition sentences and 2 subtraction sentences.
Example - 4, 9, 13. 4+9=13, 9+4=13, 13-4=9, 13-9=4
It will also be helpful for the students to practice and memorize their doubles facts. Example - 5+5=10, 7+7=14
The ability to use a variety of strategies to add and subtract leads to the development of a strong sense of number. Numbers are all around us and the skills taught in this unit are essential for daily living.
To help your son/daughter completing daily review of number facts goes a long way! Practicing the concepts of "borrowing" (when subtracting) and "carrying over" (when adding) will help him/her to remember these strategies.
Students should become aware of Related Facts. These are 3 numbers that can be used to make 2 addition sentences and 2 subtraction sentences.
Example - 4, 9, 13. 4+9=13, 9+4=13, 13-4=9, 13-9=4
It will also be helpful for the students to practice and memorize their doubles facts. Example - 5+5=10, 7+7=14
Unit Objectives:
Students will be able to...
1. Use strategies to recall basic addition and subtraction facts
2. Solve addition and subtraction equations
3. Estimate sums and differences for 2-digit numbers
4. Add and subtract 2-digit numbers mentally
5. Use personal strategies to add and subtract numbers with up to 3 digits
6. Write and sole addition and subtraction problems
Students will be able to...
1. Use strategies to recall basic addition and subtraction facts
2. Solve addition and subtraction equations
3. Estimate sums and differences for 2-digit numbers
4. Add and subtract 2-digit numbers mentally
5. Use personal strategies to add and subtract numbers with up to 3 digits
6. Write and sole addition and subtraction problems
Classroom Posters:
Please see below the posters we have in the classroom that helps your child learn!
Classroom Posters:
Please see below the posters we have in the classroom that helps your child learn!
Videos:
For more addition practice, you can click the button below for addition games! |
For more subtraction practice, you can click the button below for subtraction games! |