In the month of April, Kindergarten teachers and students will continue and complete Module 4 of the Engage NY Math Curriculum. Having composed and decomposed numbers within 8 to learn addition, students will now use similar methods to decompose numbers within 10 to learn subtraction! The lessons focus on students acting out the problem, crossing out objects in a set, and breaking and hiding parts, to construct number bonds and number sentences. It is essential that students build deep understanding and skill with identifying the number pairs of 6 through 10 because this is foundational to Grade 1’s fluency with sums and differences within 10.
Here are some terms, phrases, and strategies used in this Module:
- Use objects and drawings to find how many are left
- Represent subtraction story problems using objects, drawings, expressions, and equations
- Decompose numbers 6-8 using 5-group drawings and crossing off a part, and record each decomposition with a drawing and subtraction equation
- Model decompositions of 6-10 using a story situation, objects, and number bonds
Here are some new vocabulary words that will be introduced during this unit:
- Make 10 (combine two numbers from 1 to 9 that add up to 10)
- Minus (-)
- Subtraction (specifically using take from with result unknown)
- Take away (subtract)
How you can help at home:
- Have students draw their own story situations and share them with you! (i.e. The cat had 6 mice (student draws 6 mice), 3 went away (crosses out 3). How many mice are left?)
- Practice addition during household chores! (i.e. While setting the table: We have 2 plates on the table, we need 1 more. How many plates do we have all together?)
- Work on counting to 100 by 1s (i.e. 1, 2, ,3...), 5s (i.e. 5, 10, 15...) and 10s (i.e. 10, 20, 30...)
