We know that subtraction is taking away from a number. Sometimes it can be tricky when there are zeros involved. Here is quick tutorial video showing one strategy for subtracting when the neighbor is a zero.
A second strategy we looked at is a traditional algorithm that many people are familiar with. Have a look below to understand how to regroup numbers and borrow from other place values in order to subtract.
A big congratulations to Elliott, Cole, and Youssef this week. You are all Mathletes!
Elliott has 2 Bronze certificates so far and has earned herself the nickname “Speed Demon” on Live Mathletics. She has achieved 2046 correct answers on Level 1 and played a total of 69 games with 99% accuracy. Wow!
Youssef has also earned 2 Bronze certificates and is considered a “Junior Giant” in the first 3 levels of Live Mathletics. In Level 3, Youssef has answered 241 questions with 85% accuracy. Super work!
Cole earned his very first Bronze certificate this month! In Level 1 Live Mathletics, Cole is a “Speed Demon”! He has played 28 games with 98% accuracy. Wow!
Keep working hard, team! I wonder who will earn the first silver certificate?
A big congratulations to our new SuperStar Mathletes. Each week, we celebrate accomplishments and give special recognition to students who really shine.
Luca P. is a Mathlete! He has achieved (at last count) 2949 Live Mathletics points in the level 2 category with 92% accuracy! That’s 180 games played. Wow!
Joseph has earned a whopping 5810 participation points and has earned 2 Bronze certificates. He’s inching closing towards a silver!
Way to go! Keep up the great work, Grade 3 and 4s.
Parents, don’t forget that you if you don’t have a Parent Registration already, you can sign up here using the details of your child’s account: http://www.mathletics.com.au/parent/
You’ll then have access to view your his/her progress and results, including both weekly points summary, certificates earned and a tally of total points accumulated.
How to Play Live Mathletics
Choose your level. You can play the computer or choose Find Me a Game to play against other Mathletes.
Place the cursor over the the level tabs to see what type of questions you could be asked.
Try to choose the right level for you – look out for Bonus Points! You could earn double points if you challenge yourself!
Your goal is to improve your ranking. Your ranking is based on your recent average.
There are five different rankings to achieve: Raging Rookie, Junior Giant, Speed Demon, Almost Einstein and Human Calculator.
After you have picked your level, Mathletics will find other Mathletes for you to compete against (unless you have selected the Computer). It is possible that you might get to play the computer if there is not a good match with another Mathlete available.
The game engine selects games based on competing Mathlete’s recent averages, so the race is as fair as possible.
One game lasts 60 seconds and you have to answer as many questions correctly as you can.
You are racing against the clock, your recent average and the other Mathletes. The other Mathletes you play against will have the same ranking as you.
Be careful! 3 mistakes and you’ll strike out! If you Strike Out it will change your average and you may go down a level in your ranking.
Keep an eye out for the red line – this represents your Personal Best score.If you can beat this – you earn bonus credits for your Mathlete!
How Do Students Earn Certificates?
20 consistent weeks of work = 1 Gold Certificate
Certificates are granted when a student earns 1000 points or more within one week. This encourages students to complete a healthy amount of work each week and rewards students for every week they practice. Students initially earn a Bronze Certificate, then a Silver Certificate once five Bronzes have been earned. With four Silver Certificates, a student then receives the much-coveted Gold Certificate, demonstrating their long-term commitment and developing ability.
This past week, students in our class have been learning to be flexible problem solvers. We’ve learned 5 different strategies for adding numbers. Some strategies are faster than others, and other strategies are easier to explain. Knowing a second strategy is helpful because it can help us to check our answer.
Listen to one of our classmates give a tutorial in how to add using the strategy that involves no regrouping. Have a listen…
Starting today (Friday), our class is going to celebrate the dedication and hard work that our students put forth in using Mathletics. This online math tool helps us practice computation and improves our math fluency, especially when we use LIVE Mathletics. We love competing with one another and even with students from around the globe! If you’ve never heard of it before, click here to find out more!
Today we celebrate the participation of Cassie, Ava Y, and Vanessa on Mathletics!
Cassie has worked hard to achieve a total of 8437 points, earning herself 3 Bronze certificates.
Ava Y. has achieved a total of 8677 points, also earning 3 Bronze certificates.
Another SuperStar is Vanessa who has earned a total of 2078 points on LIVE Mathletics with 95% accuracy. Wow! (In Live Mathletics, one point is awarded for every correct answer given).
Congratulations to all of you!
How do I earn certificates?
A certificate is awarded to a student once they have earned 1000 points in a single week. Only one certificate is awarded each week, to help encourage sustained study by the student. Points are awarded across Mathletics in a number of ways…
Live Mathletics – students earn one point per correct answer
Live Mathletics – students earn two points per correct answers on their bonus level (indicated by a gold star next to the level number)
Mathletics curriculum – 10 points per correct answer within individual activities
Mathletics curriculum – 20 points per correct answer within a “Test”
Keep working hard Grade 3/4s!
Stay tuned next Friday to hear about more SuperStar Mathletes from our class.
Line symmetry can be described as one half of a shape or object being the reflection of the other half. In class, we’ve been using Miras to reflect shapes or to find what the other half of an object will look like exactly. We’ve also been folding paper objects to see if there are any lines of symmetry at all. Symmetry is everywhere: in art, architecture, nature, and all fields of mathematics!
When he was 20, Wilson Alwyn “Snowflake” Bentley photographed his first snowflake by catching the flakes on black velvet before they melted. He became an expert in snowflake photography, capturing over 5000 images.
In the picture below, how many lines of symmetry does the snowflake have?
What a beautifully white, snowy sight this morning as we were greeted with a heavy snowfall over night. There wasn’t a shortage of things to do at recess as the snow was the type that allowed you to easily build anything your heart desired!
Buses were cancelled and we missed some of our friends who couldn’t make it in to school today.
Have a look at some of our learning over the past few weeks.
Below, students are working together to sort polygons into various categories. We learned that sometimes, shapes can belong to several categories. For instance, a square is also a parallelogram and a quadrilateral.
Playing with Tangrams is a fun way to learn about geometry. Here, students were asked to put together all 7 Tangram pieces to make a square. We haven’t solved it…yet! We’ll try again tomorrow.
Our first Christmas craft was one inspired by a similar one made by my sister in 1987. Ha! I brought it in to show the students and then we made our own. Students were given a template and they chose a colour of paper (white, green, or red). It was decorated and sparkles were added. Mrs. Sullivan glued on a picture of us on the back and dated it “Christmas 2016”. They will hang beautifully on our Christmas tree in our school foyer until the last day of school. We will take them home and hopefully enjoy it for years to come.
In Social Studies, we’ve been learning about Ontario and the types of jobs one might find in the 3 regions of Ontario (Hudson Bay Lowlands, Great Lakes, Canadian Shield). Students were asked to sort the jobs into one of the 3 regions and explain why they placed that particular job there.
We’ve launched into our new unit…2D Geometry! Today we explored angles. We focused mostly on right angles which are 90 degree angles that make an L shape. Students went on a scavenger hunt looking for at least 3 things in our classroom that had angles less than 90 degrees, 3 things that were exactly 90 degrees, and 3 things that were greater than 90 degrees.
There were some amazing searching skills as students mentioned certain letters of the alphabet such as “V” had angles less than 90 degrees. Other students looked at scissors and noticed that when you opened them, they made an angle less than 90 degrees.
We learned that we could use our notebook corner to help us measure and compare.
What are some objects around your house that you could add to your chart?