Sum To 20 Puzzle

In Math Concepts, nosotros ran out of That's Logical puzzles a few weeks ago, then I had to honour a novel source of daily warm-ups. Instead, I've started using puzzles from "THINK ABOUT IT! Mathematics Problems of the Day" past times Marcy Cook. This mass was published past times Creative Publications inwards 1982, together with for in 1 lawsuit I would non recommend ordering a re-create off of Amazon.


If you lot already move on to accept a copy, cherish it together with don't allow anyone borrow it!

Wednesday, I position this puzzle upward on the board. And, I challenged my students to solve it on their private white boards.


This. Did. Not. Go. Well.

Students were confused past times the fact that at that topographic point were already ii fours inwards the puzzle. Students were confused whether they had to purpose each number betwixt 0 together with ix alone in 1 lawsuit or if they could purpose approximately to a greater extent than than in 1 lawsuit together with others non at all. I ended upward encouraging my students to write the numbers 0-9 on their dry out erase board then that they could grade off each number every bit they used it.

This nonetheless did non larn well. Students were bringing me their whiteboards to banking concern tally their answers, together with it was clear that they had misunderstood the instructions. Many had made each row amount to 20 without worrying most the columns. These students produce tend to cope to a greater extent than than most. This is business office of the argue they are inwards Math Concepts, a degree created for our ninth graders who are non yet develop for Algebra 1.

After telling pupil afterwards pupil that their reply was incorrect, I eventually decided nosotros needed to halt this activeness together with regroup. I told them to position their dry out erase boards away amongst the hope that nosotros would tackle this puzzle in 1 lawsuit again the adjacent day.

H5N1 few minutes on the figurer together with approximately character fourth dimension amongst my laminator led to a version of this puzzle amongst moveable pieces.


The adjacent day, my students seemed reluctant to attempt the puzzle in 1 lawsuit again until they realized that it was inwards a slightly unlike form. With the moveable pieces, they jumped into the puzzle amongst a fleck of excitement.


Within alone a few minutes, my students started announcing that they had solved the puzzle. It was adorable to sentry them endeavour to comprehend their solution from the prying eyes of their classmates. I've had issues amongst this degree sharing puzzle answers, then it was particularly proficient to come across this.


This was no longer an impossible puzzle only a puzzle amongst a solution worth working towards.


There's approximately other variation of this puzzle that sums to 21 inwards the mass that I expect frontwards to trying amongst my students afterwards this whole strike draw of piece of occupation organization is over.


Want to attempt this puzzle amongst your ain students? I've uploaded the file here.

This puzzle would live on a dandy improver to a puzzle table, every bit well!

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