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Adding 2 Digit Numbers to 100•
Addition

Addition using Decomposition (A) WORKSHEET

Suitable for Grades: 1st Grade, 2nd Grade
CCSS: 1.NBT.C.4, 2.NBT.B.5
CCSS Description: 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.

Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.

Addition using Decomposition (A) WORKSHEET DESCRIPTION

This worksheet is the perfect place for students to begin adding 2 two digit numbers. Firstly students will decompose numbers into tens and ones. Then students will then answer nine addition questions by adding the tens together, adding the ones together and then adding their two answers together. The sum of the ones does not exceed 9. All answers are under 100.
All our primary resources include space for students' names and the date.

All worksheets are created by the team of experienced teachers at Cazoom Math.

Addition using Decomposition worksheet perfect for students in 1st Grade

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Frequently Asked Questions

This addition using decomposition (a) worksheet is designed for students in 1st Grade and 2nd Grade and aligns with Common Core State Standards.