Celebrating 100 days of Maths

Days 52 - 76

2015

Grade 3 students making links between Addition and Subtraction using grids, concrete materials and written numerals & symbols

The One Minute Challenge Grade 4/5WR have set a school record in the ‘One Minute Challenge’. We worked in pairs. One child rolled the dice. The other counted out the number rolled using lima beans. One pair counted out a pile of 174 lima beans in one minute. We practised estimating the amount of beans we had before we counted them. We estimated what we thought the range might be and then we counted the actual beans.

Grade 2 celebrated Day 54 of

Maths learning about length.

Then they measured tables and doorways with a’ bird eating tarantula’ (it can be up to 30 centimetres wide).

Measuring carefully. Checking which strip is longest.

Ordering the strips from shortest to the longest. Using a baseline made it easier to check.

Comparing curvy lines can be tricky. But not for these clever measurers.

Grade 4/5 WR investigated the number 55. We found that it was a triangular number and a pyramidal number. We made pyramids with 55 cubes and we made all the triangular numbers up to 55 using counters.

55 is a triangular number

1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 = 55

Here we are making triangular numbers

We made pyramids using 55 2cm cubes. The base of our

pyramids was a 5 x 5 square.

Gr 4/5E read ‘Sadako and the Thousand Paper Cranes’. So far, we have made 64 cranes. We have 936 to go. As we were making them we came across many different shapes. We folded our birds into squares, equilateral triangles, isosceles triangles, diamonds and kites. We also made some irregular pentagons.

Finding the Difference Grade 4/5WR used the ‘One Minute Challenge’ to make two numbers per pair. Each pair pegged their 2 numbers on the number line. The first number made had a purple peg and the second number used the blue peg. The children had to sit next to the number line and mentally calculate the difference between their 2 numbers. We shared the strategies that we used to find the difference.

Bubble, Bubble Doubles trouble! Grade 2 practising their doubling.

Grade 2 have been learning about subtraction and using strategies for subtraction. Here we are practising to count up from the biggest number.

We have twelve blocks and we need to hide some blocks in the cup. Our partner needs to count the blocks he can see, and then count up to twelve to find the missing blocks.

Grade 2 have been learning about fact families. We have been practising our addition and subtraction using fact families. We are getting better at subtraction.

Today’s warm-up activity in Grade 3 Math: Students work in pairs and take it in turns. 1. Using cards A-10, pair pairs. 2. Record them on the sheet and find their total. Keep hidden 3. Tell partner ONLY the answers. They then try to figure out the correct pairs to create all totals by only using each card once. 4. Swap and repeat.

SPEED AND ACCURACY! Today Grade 3 competed against their personal best time to complete the sheet. This is always followed up with a short discussion about accuracy and how their time may be good but accuracy counts too. This promotes fluency in simple subtraction.

Grade 3 working on their Mental computations of addition during our warm-up today. In groups, students take turns to roll two dice and add them together. Using counters to cover answers.

Grade 4/5E students investigated the number 64. They also learnt the song ‘When I’m 64’ by The Beatles and performed it for the whole school at assembly.

They all sang beautifully and impressed the audience with their actions. Well done Grade 4/5E!!

Today Grade 3’s drew a 1 metre line on an A4 page. They were given a starting point and told to measure & label each line they drew, making sure that no two lines were the same. They kept a running total on the side of their pages and practiced using calculators to add and subtract line measurements. To extend this, they were given a finishing point. This prompted discussions on angles, direction, estimation and strategies for working it out.

On Day 68 grade preps and ones practised counting by 2s.

2, 4, 6, 8, 10, 12…….. The children used match sticks and pictures to help solve the problem below. Then they counted by twos to make sure that they had 28 legs.

They found out that there were 8 ducks.

Grade one have been practising to make numbers to 99 with a variety of materials. They know that it is easier to keep track of numbers if they structure them in tens and ones.

sixty-seven 67 = 60 + 7 6 tens and 7 ones 10, 20, 30, 40, 50, 60, 61, 62, 63, 64, 65, 66, 67

On Day 68, children in grades 4 and 5 have been problem solving. This is the Heads and Legs problem. Sarah and Sam went to their uncle's farm at the weekend. While they were there watching the cows they noticed there were roosters in the cow paddock too. Sarah counted the legs they could see: there were 22. Sam counted the heads they could see: there were 8. Then they ran back to the farmhouse to tell Mum what they counted. Clever Mum! She listened to the number of heads and the number of legs and worked out the number of animals of each type in the paddock. The children then investigated lots of combinations of heads and legs to find a way that they could always work out the number of animals in the paddock.

Money, Money, Money! Grade 2 have been learning about money. Today we worked on making collections of coins up to $2. We played a fun warm up game with a partner.

Today we sorted the Australian currency into dollars and cents and notes and coins. We discovered that some coins are actually dollars. We investigated the ways to make $1.

Grade 2 Celebrates 70 Days of Maths

Grade 2 have been learning about Location and Position. We went on Google Earth and had a look at our school from a ‘bird’s eye view’. We also took some photos of objects in our room.

Grade 4/5 E celebrated Day 72 Today we were solving problems from our math task centre. Some of us had to make tangram pictures and some of had to solve word problems. We also had Roman numeral puzzles to solve.

Problems, problems Ah, Ah, Ah! OOOH, I love problems – or was it onions? The grade 6 children have been working on a variety of different strategies to use to solve mathematical problems.

The grade 6 children were using the ‘ make a model ‘ strategy to solve problems. Here they have made six squares and the challenge is to remove 4 sticks to leave 4 squares. The children worked in pairs and all pairs were able to solve the problem after a good deal of trial and error happening. On the next slide you will see the answer.

The children were actually able to find three solutions to the problem –CLEVER KIDS!! They were then given the challenge to remove 5 sticks and leave only 3 squares.

The clever little devils were able to do that as well.

Grade one practised division. 24 pieces of gold shared between 2 pirates = 24 pieces of gold shared between 6 pirates = How many different ways can we share the gold fairly?

Sharing the gold. BEWARE!! Here comes another pirate. How many pieces of gold will we get now!

GOLD GOLD GOLD On day 76, the grade ones read a book called Pirates Gold.