Subtracting Reverses

March 23, 2020

Another video challenge to share, called Subtracting Reverses. Once again, a strange little mystery can motivate a ton of subtraction practice. The subtraction here is focused on 2-digit minus 2-digit examples. However, by coloring a hundred chart as you go, you can find really interesting patterns, many of which you may be able to explain.

If you want to take this problem to the next level, try reversing 3-digit numbers and see what happens when you take the difference!

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Evangeline Gray
Evangeline Gray
1 month ago

Oh my goodness, wow!! I am mindblown completely!!! Thank you, Dan

Emmett
Emmett
1 month ago

But yet mind blowing 🤯🤯🤯

Emmett
Emmett
1 month ago

This does not equal nine e.g. 542 – 245 = 297

Emmett
Emmett
1 month ago

Interesting 🤔