Make 10 (Bridging)

Make Ten is a key strategy for any addition facts with an 8 or a 9. We want students to think “How many more are needed to make 10?” and then “How many are left over?”

For example: 8 + 7

How many more are needed to make 10? 2!

If the 2 is taken from the 7, how many are left over? 5!

So, 8 + 7 is 10 + 5, or 15.

Key subskills are knowing how many more are needed to make 10 (bonds of 10), and how much is left after that step (-1 or -2). The near numbers one less and two less should be practiced using ten frames and dot plates. The near number page also has other strategies.

One way to help students record their thinking is to use branch diagrams to show how they partitioned the numbers. This can also support work done in grade 2 for partitioning multidigit numbers to add.

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This ability is also used in later years for multi digit computations, such as 28 + 7. It forms a key subskill in developing jump strategies for performing multidigit addition and subtraction.

 

Make 10 Flash Cards

These cards show two ten frames. They are filled in with bingo dabbers or dot stickers to show facts, such as 9+8, where the make 10 strategy is efficient. Full instructions are on the first page.
Make 10 Slider Cards
These cards are much like the flash cards above. However, after mentally moving the dots to make a full ten frame, the inside slides out showing the conversion to a +10 fact. Contributed by Sherrie Hearn-Smith.
Bridging Scaffold Sheets
This sheet helps students split the second addend to build to 10. Example included on first page.

 

Comments

  1. Ted Striker says:

    Why turn a one-step question into a 3-step problem? What is the rationale behind this strategy, how does it make things easier for the student?

  2. Thanks for these–very good examples of using structure to learn number combinations with understanding vs. memorization like I did in elementary school!

  3. The old way of education sorted smart students from not so smart students. This way of teaching allows the sharp/quick students to work quickly using their one or two steps and allows the student who needs additional support to have access to the learning using more steps. Memorizing use to work and still will; however, if a students doesn’t know why something works, they will not function in the world. Efficiency comes with understanding. Back in the day efficiency came because we copied what the teacher told us to do. By the way, China and India teach these concepts, techniques, and computation skills at an earlier age. America is behind because parents choose not to make or take time to help and support their kids. Learn the strategies to support your child, and if they get it, then work on efficiency.

  4. I use bridging strategies a lot when I’m thinking about time. For instance: What year was it seventeen years ago? If I used a standard subtraction algorithm to compute 2016 minus 17, I’d need pencil and paper; but if I subtract 16 and then subtract 1, I can do it in my head. Likewise for questions like “What date was two weeks ago?”, “What time will I get home if I leave work at 5:25 and it takes 40 minutes to drive?”, etc. To cultivate the skill of bridging, it’s helpful to practice on simpler examples like 8+7, where (as Ted points out) it would be more efficient to simply consult a memorized addition table. Such examples can strike parents as pointless, but they’re about skill-formation, not the answers to particular problems. (Analogy: When you learn to ride a bike, you fall down a lot in trying to get from A to B. “Wouldn’t it be more efficient to just leave the bike and walk?” Yes, if your goal is to get to B; no, if your goal is to learn how to ride a bike.)

  5. This makes things more complicated

  6. My younger sibling had trouble through this and it’s way more complcated

  7. Anonymous says:

    gesuss wat

  8. good

  9. I taught my first grader how to add and subtract in one week this new way of doing things is plain stupid why make things harder to understand if you don’t need to hopefully Trump gets rid of this crap.

  10. This bridging just confuses kids even more! I see my children who can add and subtract very well get seriously confused and find simple math complicated…Very poor teaching strategy…

  11. John Doe says:

    HI

  12. My first grader has this with his math homework. He’s a gifted math student and tests at the 5th grade math level. He never had a problem with math until they threw this at him. He struggles with this and also hates near doubles strategy. I understand bridge strategies and use them myself when doing more complicated math in my head. However, taking a simple problem and using strategies to make them more complicated is confusing because your brain almost wants to rebel against adding steps to solve something when the answer is already in your head. I honestly don’t think it’s helpful to introduce the strategy until the math gets a little more complicated.

  13. I am so glad to see that other parents see it the way I do..Its so frustrating cos my son finds my simple way of subtracting or adding easy..this bridging methodolgy just confuses him. Such simple sums become so complex!

  14. Diane Amelia Read says:

    I’m glad to have this addition approach in my toolbox. If your child or students gets math in a pretty straight-forward way, then great. This is an effective alternative for students who don’t, including adult learners.

  15. Diane Amelia Read says:

    For simple addition, the colored dots shown above is a great for visual and kinesthetic learners. It develops math thinking and not just rote memorization.

  16. Bridging is such an important procedure to learn. It’s essentially speeding up computational skills. Understanding the first 10 digits that re-occur in our entire number system is vital to developing fluency in mathematics. I am currently tutoring a young girl who wasn’t taught this stuff early and is now struggling in her later years because of this gap in knowledge. It’s especially useful for children who are stuck using basic or remedial counting strategies that will essentially hinder all further achievement. Hadn’t seen the partitioning of addition sums like that before. Makes it way more relevant. Thanks a bunch.

  17. Anonymous says:

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  18. Anonymous says:

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  20. Anonymous says:

    too easy

  21. to easy

  22. Great ideas!
    Number Bonds Memorizer – iPhone, iPad app.
    While the game is simple and has minimal levels, the basic number bond practice is solid.

  23. U ok?

  24. My name is jeff says:

    I think this is really good

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