Unit 1 – Addition: Meaning and Facts to 10
Dear Parents,
Our first math unit will be Addition: Meaning and Facts to 10.
In this unit, students will:
Begin to gain fluency with basic facts within 10.
The focus is not on memorization, but instead on understanding how parts of numbers go together in order to gain fluency.
Solve a variety of word problems within ten and write number sentences/equations to go with those problems.
Understand that the equals sign means “same as”.
The essential questions for this topic are:
What are ways to think about addition? Students will learn that addition means put together, but there are several kinds of situations that relate to addition.
Join – Combine Two Groups: Four black fish are put in a tank. Five gold fish are put in the tank. How many fish were put in the tank?
Part-Part-Whole: Four cats and six dogs are in a kennel. Altogether, how many dogs and cats are in the kennel?
Compare: Barney has seven old coins. Steve has two more old coins than Barney has. How many old coins does Steve have?
What strategies can be used to find addition facts? Students will learn different ways to add numbers with sums to 10.
How can numbers to 10 be shown using 5 and some more? Students will be learning to show numbers on a ten-frame and find parts of ten.
For example: The number 7 can be thought of as “5 and 2 more”
Vocabulary words you will want to encourage your child to use at home are: addition sentence, addends, plus, add, join, sum, equals, in all, part, whole, double, and order.
Ways that you can support your child at home:
Practice recognizing dot patterns instantly (e.g.
= 5).Tell an addition story and have your child draw a picture to solve. For example: There are seven people in the pool and 2 outside the pool on the deck. How many people are there in all? Extend by labeling the picture and writing a related addition fact.
Find out how many ways two parts can make the numbers 6, 7, 8 and 9.
Have your child create an addition (joining) story using two single-digit numbers.
Generate two single-digit numbers. Use these numbers to write two addition sentences, but in a different order and compare the sums. For example, 5 + 2 = 7 and 2 + 5 = 7.
Use small objects (i.e. paper clips) to show different ways to solve addition story problems (e.g. Tommy has 7. He puts them into 2 pencil boxes. What different ways can Tommy do this?).
Say a number up to 10. Ask your child to tell you what is 0 more, 1 more or two more than the given number. Ask your child to tell you what is 0 less than, 1 less than, 2 less than the given number.
Have your child look for doubles around the house and identify the double fact for the objects.
Pose some near doubles for your child to solve where one number is 1 greater than the other (eg. 4 + 5,
3 + 4, 8 + 9, 7 + 8, etc. ). Ask your child to explain how you can use a double to help them find the sum.
Give your child a number from 6 to 10. Ask them to tell you an addition fact with a 5 for that number. Then ask them what number can be added to the number to make 10.
Hold up 9 fingers. Ask your child to tell you how many fingers are up and how he or she knows. Encourage your child to relate the number 9 to 5 and 10. (For example: 5 and 4 is 9, 1 away from 10 is 9.)
Regards,
The First Grade Teachers
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