Return to Ray's Intellectual Arithmetic
Learn how to add basic numbers together into a combined value. When we do this, we write numbers larger than 9 with two or more digits. Learn how we combine larger numbers by grouping numbers into groups of tens. This is called the decimal system.
Topics from Unit 1:
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- addition
- place value
- carrying
- word problems
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Unit 1 Lesson contents:
Ray's Lesson 4 instructional video
Assignment - complete exercises for lesson 4
Activity - Use Cuisenaire rods to practice showing carrying with addition problems
This unit is the recorded lessons through Ray's New Intellectual Arithmetic. This book is available for free on google books. Activities for these lessons can be found described on the lesson page and also at the Scio Academy facebook group. (facebook.com/groups/scioacademy)
For specific help on a concept, feel free to select the unit that corresponds to your text or email you tutor!