More Than Ten OnesMore Than Ten OnesMore Than Ten OnesMore Than Ten Ones

Objectives: We will solve addition problems with Objectives: We will solve addition problems with 2-digit numbers using strategies that involve 2-digit numbers using strategies that involve breaking numbers apart by place or adding one breaking numbers apart by place or adding one number in parts.number in parts.

We will solve addition problems with 2-digit We will solve addition problems with 2-digit numbers that involve more than 10 ones in the numbers that involve more than 10 ones in the ones place and explaining the effect on the sum.ones place and explaining the effect on the sum.

ReviewReviewReviewReview

What is an equation? Give an example.What is an equation? Give an example.

Esha had 67 stickers. She gave Mr. Esha had 67 stickers. She gave Mr. Spriha 33 stickers. How many stickers Spriha 33 stickers. How many stickers does Esha have now?does Esha have now?

*Write the equation and solve this *Write the equation and solve this using two strategies! (ie. Traditional, using two strategies! (ie. Traditional, place value blocks, adding by place)*place value blocks, adding by place)*

Approaching a ProblemApproaching a ProblemApproaching a ProblemApproaching a ProblemThe problem: The problem: Ari had 63 baseball cards. His Ari had 63 baseball cards. His

mother gave him her collection of 26 cards. mother gave him her collection of 26 cards. How many baseball cards does he have now?How many baseball cards does he have now?

How many cards did Ari have to start?How many cards did Ari have to start?

How many more did his mother give him?How many more did his mother give him?

What equation can we write to represent What equation can we write to represent this problem?this problem?

Take 2 minutes to solve the problem with Take 2 minutes to solve the problem with a partner… Do it on a sticky note!a partner… Do it on a sticky note!

What strategies did you What strategies did you use?use?

What strategies did you What strategies did you use?use?

Here’s a great strategy… Adding by Place Here’s a great strategy… Adding by Place Strategy Strategy

Adding by Place Strategy.Adding by Place Strategy.Example: 63 + 26 = ?Example: 63 + 26 = ?

60 + 20 = 8060 + 20 = 80 3 + 3 + 6 = 96 = 980 + 9 = 8980 + 9 = 89

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But… I don’t know if you’re ready for this awesomeness.

But… I don’t know if you’re ready for this awesomeness.

Try this problem on your Try this problem on your own using the adding by own using the adding by

place strategy!place strategy!

56 + 78 = ______________

What strategies did you What strategies did you use?use?

What strategies did you What strategies did you use?use?

Here’s another great strategy… Adding Here’s another great strategy… Adding one Number in parts Strategyone Number in parts Strategy

Adding One Number in Parts.Adding One Number in Parts.Example: 63 + 26 = ?Example: 63 + 26 = ?

63 + 10 = 7363 + 10 = 7373 + 10 = 8373 + 10 = 8383 + 6 = 8983 + 6 = 89

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Wait for it…...............Wait for it…...............

Solve this problem on your Solve this problem on your own using the break apart own using the break apart

one number strategy!one number strategy!

45 + 39 = ____________

Vertical EquationVertical EquationVertical EquationVertical Equation

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This is what the equation looks like vertically. Remember, you can use this strategy but you must know other strategies as well!

63 + 26 89

Try a Number Line Try a Number Line (in the free space (in the free space

below!)below!)56 + 2456 + 24

Try a Number Line Try a Number Line (in the free space (in the free space

below!)below!)56 + 2456 + 24

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Guided PracticeGuided PracticeGuided PracticeGuided PracticeSolve this problem:Solve this problem:Vanessa went to Sticker Station and bought 6 strips Vanessa went to Sticker Station and bought 6 strips

of 10 and 3 single star stickers, and 2 strips of 10 of 10 and 3 single star stickers, and 2 strips of 10 and 9 single moon stickers. How many stickers and 9 single moon stickers. How many stickers did Vanessa buy in all?did Vanessa buy in all?

You must use 2 of the strategies below to solve:You must use 2 of the strategies below to solve:Adding by place, adding one number in parts, orAdding by place, adding one number in parts, ornumber line. number line.

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Model It… Please (pictures)Model It… Please (pictures)Model It… Please (pictures)Model It… Please (pictures)

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63 + 26 = 8963 + 26 = 89 63 + 29 = 9263 + 29 = 92

Left Side – Create a 2 tab foldableLeft Side – Create a 2 tab foldable