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Shopping at the School Store

By Platform Administrator · Submitted Sep 30, 2026

Content Area
Mathematics
Grade
1

Students choose items two at a time at a school store and add them together, and show two different ways in arriving at the totals. They are then given a set amount of money that is a multiple of ten and select an item that is subtracted from the total they have, and then show two different ways in arriving at the total remaining money. Students then explain to an audience how they solved their addition and subtraction problems.

MA Standard

1.NBT.C.4
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.

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