This week in maths 3D has been exploring the concept of “rounding” and building their understanding by using a number line. The use of a number line helps students to visualise what tens or hundreds a number is CLOSEST to so as to “round” it appropriately.
The use of terms like “round up” and “round down” can confuse students. For example, the number 37 would round to 40 or they say it “rounds up”. The digit in the tens place is changed from 3 to 4 (rounds up). This misconception is what causes the problem when applied to rounding down. The number 32 should be rounded (down) to 30, but using the logic mentioned for rounding up, some students may look at the digit in the tens place and take it to the previous number, resulting in the incorrect value of 20. Asking questions such as: “What multiples of ten is 32 between and which is it closer to?” and developing the understanding of what the answer choices are before rounding can alleviate much of the misconception and confusion related to rounding.
To support at home you might like to ask your child questions such as, “What tens number would 63 round to? Why?”, “What hundreds number would 567 round to? Why?” or “If my number could be rounded to 40, what might my number be?” Ask your child what might happen to a number that is in the middle between two “tens” numbers or two “hundreds” numbers.
On Thursday 3D performed their gymnastics routines for the ECC children at their assembly. Take a look here.
In uoi time, we revisited our list, from the start of the unit, of things around UNIS that we thought were simple machines. We marked those we are now more sure about, those that we now believe are definitely NOT and some we’re still wondering about. We also added some we didn’t realize actually were simple machines.
We have also begun designing our own creations that make life, work or play easier or more fun. We are excited to announce……….
We hope you can make it. To support the building of designs we are looking for: toilet roll tubes, small cardboard boxes (e.g. milk cartons, gift boxes), plastic bottle tops, ribbon.
October break: Saturday 5th October through Sunday 13th October
Grade 3 Innovation Fair, 2:45pm Friday 18th October
UN Day Monday October 21st