19:40
Lesson 9 Session 1
Ways to model word problems.
10:48
Practice - Subtraction strategies with two-digit…
Practice - Subtraction strategies with two-digit numbers
Strategies to subtract two-digit numbers - regroup with base-ten blocks, regroup writing out tens and ones, and open number line.
12:56
Practice - Strategies to find a missing addend…
Practice - Strategies to find a missing addend (two-digit)
Strategies to find a missing addend - open number line, add up to the next ten, draw base-ten blocks.
16:01
Lesson 7 Session 4
Practice subtracting two-digit numbers.
01:32
Open number line addition
02:22
Subtraction Using the Open Number Line (grade 3)
01:10
Missing Addend using an open number line (grade 3)
01:36
Addition using an Open Number line(grade 3)
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