Making a Ten: Addition and Subtraction Within 20: Math Unit 4, Grade 1 (Letters & Devotion)

Description

Making a Ten: Addition and Subtraction Within 20 is Unit 4 of Tens, Ones, and Adventures: Grade 1 Mathematics (Grade 1), the Letters & Devotion Math course, complete in one printable PDF: 10 lessons, the unit check-up and the answer key, 41 pages.

• Ten’s partner facts (pairs of numbers that sum to 10)
• The full ten-frame as a single countable unit
• Conservation of quantity under regrouping in the make-a-ten strategy
• The make-a-ten addition procedure (decompose an addend, fill the ten, add the remainder)
• The take-apart-a-ten subtraction procedure
• Correct versus incorrect ten-frame regrouping representations
• Associative/commutative reordering of three addends
• Strategic pairing choice among three addends with ambiguous ten-partner options
• Two-step word problems with three whole numbers, within 20
• Strategy selection between within-10 recall and within-20 make-a-ten/take-apart procedures

Every lesson is written for a parent with no teaching background: it opens with a short script to read aloud, names the specific wrong idea a student is likely to reach for and how to correct it, and closes with a practice sheet you may copy for your household. Scripture references are King James Version throughout. Black-and-white, 8.5 x 11 in. The whole year of this course is also in this store as a single book.

AI note: The written content of this resource was drafted with AI tools, then reviewed and edited by the author.