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…..to our THIRD GRADE MATH CLASS! This PowerPoint was developed by Jessica Kresky and her Third Grade Team

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…..as we review some of the things that we’ve learned.

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Hoot if you’ve heard of number bonds. Not number bons… Not number bombs… Not nummer bonds… But number bonds.

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Number bonds show a relationship of numbers.

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GREAT JOB! Let’s begin.

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Mental Addition: Strategy One: Make a number bond. Use expanded form. Add the tens and then add the ones. Find 36 + 57 STUDENTS, TEACH IT!

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Mental Addition: Strategy One: Make a number bond. Use expanded form. Add the tens and then add the ones. Find 19 + 37 ADULTS, TRY IT!

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GREAT JOB! Let’s keep going!

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Mental Addition: Strategy Two: Make a number bond. Round up. Add the tens, then subtract the extra ones. Find 36 + 46 STUDENTS, TEACH IT!

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Mental Addition: Strategy Two: Make a number bond. Round up. Add the tens, then subtract the extra ones. Find 28 + 36 ADULTS, TRY IT!

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GREAT JOB! Let’s keep going!

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Mental Subtraction: Strategy One: Make a number bond using expanded form. Subtract the tens, then subtract the extra ones. Find 55 - 23 STUDENTS, TEACH IT!

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Mental Subtraction: Strategy One: Make a number bond using expanded form. Subtract the tens, then subtract the extra ones. Find 87-34 ADULTS, TRY IT!

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GREAT JOB! Let’s keep going!

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Mental Subtraction: Strategy Two: Make a number bond by rounding up. Subtract the tens, then add the extra ones. Find 72 - 37 STUDENTS, TEACH IT!

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Mental Subtraction: Strategy Two: Make a number bond by rounding up. Subtract the tens, then add the extra ones. Find 84-38 ADULTS, TRY IT!

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Ready? Aim for 100.

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More Mental Addition: Make a number bond by rounding up to 100. Add 100, then subtract the extra ones. Find 39 + 96. STUDENTS, TEACH IT!

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More Mental Addition: Make a number bond by rounding up to 100. Add 100, then subtract the extra ones. Find 18 + 98 ADULTS, TRY IT!

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GREAT JOB! Let’s keep going!

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Ready? This is going to be so COOL!

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More Mental Addition: Make number bonds by rounding to 100. Add the hundreds. Then, subtract the extra ones. Find 97 + 96. STUDENTS, TEACH IT!

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More Mental Addition: Make a number bond by rounding up to 100. Add 100, then subtract the extra ones. Find 97 + 99 ADULTS, TRY IT!

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GREAT JOB! Let’s stop!

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