The integer at the top of each of these 9 rectangles is the sum of four addends contained in each rectangle. Shade the boxes containing the addends you use to get the sum. You will use one addend in each row.

Notice that the 4 numbers circled to make -2 are not the right combination.

# All posts by mathconfidence

# April 2021 brain puzzler solution

There are a total of 18 triangles:

9

3 small triangles ABC ACD ADE

3 medium triangles AFG AGH AHI

3 large triangles AJK AKL ALM

also 6 more

triangles

ABD ACE

AFH AGI

AJL AKM

3 more:

ABE AFI AJM

# two modes at once: hybrid and in-person

I have long said that being a classroom teacher is like being Santa. The Tooth Fairy is busy every night of the year but Santa has to be everywhere all at the same time. As teachers, we want to be able to help all of our students at once — in pre-covid times, we could check on students by walking around/circulating the classroom. This type of informal assessment could help teachers gauge student learning and make in-the-moment decisions about pacing and content. In a digital or hybrid environment, getting feedback is more challenging especially when many teachers are doing both In Person and Online.

Teaching in 2 modes simultaneously is the reason that many teachers (and their unions) have been reluctant to go back into the building. It’s not just the health risk of being with students (hopefully your state/country has made the vaccine available to educators) but rather the demand to teach to those students in front of you while also addressing the needs of the students who are at home.

Some online tools that have been helpful:

Google Jamboard

Google Docs/Slides

Kahoot

Desmos

Pear Deck

Mentimeter

A second computer or monitor (which I may now finally invest in)

Having a stylus or pen for writing on a tablet/screen

Many of these tools allow for student input and teacher feedback digitally to foster critical thinking and build community. Hoping that these tools can help students feel like they got a visit from Santa!

I also plan to incorporate Project Based Learning which will encourage students to choose their own numbers/topic/place to create opportunity for independent and original work.

Please feel free to comment with any ideas/suggestions.**Here is a Wish List (Tools I have imagined (but am not sure if they exist): **Chat Monitor Notification (a sound when someone types into the chat)

Authentication of Student Work/Presence (Beyond Lockdown Browsers)

# March 2021 brain puzzler solution

Make three three-digit numbers that add up to as close to 1000 as possible using the digits 1- 9 only one time each.

There are multiple answers that would get 999 such as 247 + 563 + 189 or 164 + 237 + 598.

Is 1000 even possible? Here is a link to a Geogebra to help you check.

# february 2021 brain puzzler solution

The puzzles above are all about Order of Operations:

50 + 50 – 25 x 0 + 2 + 2

50 + 50 – 0 + 2 + 2

104

48 divided by 2(9 + 3)

48 divided by 2 x 12

Now go from left to right

24 x 12

288