Download - …..to our THIRD GRADE MATH CLASS !
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…..to ourTHIRD 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 + 57STUDENTS, 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 + 37ADULTS, 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 + 36ADULTS, 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 84-38ADULTS, 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 + 98ADULTS, 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 + 99ADULTS, TRY IT!
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GREAT JOB! Let’s stop!