Subtracting within 20

Duration: 25-45 Minutes

Grade: K-2

Subject Area:

Math
Computer Science/Coding

Description

Students will use number cards to subtract within 20, then they'll make an indi program to build the difference.

Objectives

I can subtract within 20.
I can add within 20.

Links

For Teachers

Teacher Guide

Number Cards

Point Values

For Students

Student Handout

Standards

CCSS

1.OA.6: Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten; decomposing a number leading to a ten; using the relationship between addition and subtraction; and creating equivalent but easier or known sums.
2.NBT.5: Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.

CSTA

1A-AP-10: Develop programs with sequences and simple loops, to express ideas or address a problem.
1A-AP-11: Decompose (break down) the steps needed to solve a problem into a precise sequence of instructions.

Report abuse