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Sharon Sinclair

Using Mental Math (and 🍪s) to Subtract!

Grades: 2nd Grade
Subjects: Math
Standards: Fluently add and subtract within 20 using mental strategies.2 By end of Grade 2, know from memory all sums of two one-digit numbers. (2.OA.2.)

Student Instructions

Take turns on every other page. 1. Partner A: Click the black flex card once to find your total 🍪s. 2. Make a row with that many 🍪s. 3. Partner B hides their eyes. Partner A hides some 🍪s behind the cookie jar. 4. Partner B looks at the card and remaining 🍪s, then types the solving subtraction equation! 5. Partner A moves the jar to check if Partner B is correct. 6. Partner A types the other correct subtraction equation. Switch roles on the next slide!

Teacher Notes (not visible to students)

i-Ready Gr. 2 Lesson 2 Day 2 Math center Above Level (#s 11-19)

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