*30

days worth of number strings geared to the third grade subtraction skills. Number Strings are research-based Number Talks that have shown to improve number sense and mathematical fluency. This resource can be used as a tier 1 daily routine or as intervention for older students. I have used this resource in grades 2-6 to improve number sense and operational accuracy. Can be used with other number sense routines to further enhance number sense!

This can be a short unit OR used as intervention in small groups with students who lack operational number sense. Has also been used as a bell ringer! Kids often learn the standard algorithm and then forget to think about what they are doing!

2nd grade Subtraction Skills:

Skill 1: Subtract a one- or two-digit number from a two-digit number, without renaming. 

Skill 2: Subtract a one-digit number from a two-digit number of 20 or more, with renaming

Skill 3: Subtract a two-digit number from a two digit number of 20 or more, with renaming

3rd grade Subtraction Skills:

Skill 1: Subtract a two- or three-digit number from a three-digit number, without renaming

Skill 2: Subtract a two or three-digit number from a three-digit number, with renaming from tens to ones and hundreds to tens

4th Grade Subtraction Skill:

Subtract a three-digit number from a four-digit number, with renaming from tens to ones, hundreds to tens, and thousands to hundreds

Standards:

Mathematical Practices K-6

2nd, 3rd, and 4th grade subtraction standards

Anticipated Strategies:

-Compensating

-Adding on to subtract

-Making Tens

-Place Value

-Standard Algorithm

-Doubling

-Counting All/ Counting on

-Counting Back/ Removal

***The idea for this product originated in my master's thesis project in which I worked to improve the number sense of my students. This has shown to help with Acadience Math Computation as well as overall operational fluency, mathematical reasoning, and discourse.