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Unit 1, Lesson 33

Model 0 less and 1 less pictorially and as subtraction number sentences.

EngageNY 60 min(s)Support for English Language Learners

In this lesson, students use Rekenrek bracelets and simple math drawings to show 1 less and 0 less than a number 1-10, and create number sentences to represent each situation. For example, push 1 bead away from a set of 8 beads or cross off 1 picture from a set of 8 pictures, and relate this action to the expression 8 - 1.

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Other lessons from Unit 1 in Grade 1 by EngageNY

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Unit 1, Lesson 32

Solve put together/take apart with addend unknown math stories.

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Unit 1, Lesson 34

Model n – n and n – (n – 1) pictorially and as subtraction sentences.

60 min(s)

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2 Content Standards are aligned with this lesson

1.OA.C.5
1.OA.C.6

Major StandardsSupporting StandardsAdditional Standards

Standard 1.OA.C.5

Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).

Part of Major Cluster 1.OA.C

1 Math Practice Standard is aligned with this lesson

Standard MP.8

Look for and express regularity in repeated reasoning.

Prerequisites for 1.OA.C.5

Kindergarten

K.CC.B.4.C

Understand that each successive number name refers to a quantity that is one larger.

Upcoming Standards for 1.OA.C.5

1st Grade

1.OA.C.6

Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).

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