About This Lesson
This is a PowerPoint which clearly shows how to draw a numberline to help children add 10 and 1 more. Aligned with Common Core State Standards: 1.NBT.2, 1.NBT.4, 1.NBT.5, Number and Operations in Base Ten.
lesson
68 Downloads
Grade Level
Grades K-2
Resource Type
Presentation
Standards Alignment
Common Core State Standards
License
Standards
Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:
Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten.
Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.
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