## 100s Chart Reveal

### Posted by Perri Wilkinson | Posted in Number, Place Value | Posted on August 29, 2017

Materials:

• 1oos chart
• Unifix – enough to cover nearly every number (98 or so)
• cards with 1-100

Students start with their 100s chart covered in unifix with only a couple of numbers being showed. Each student takes it in turn to turn over a card. They must then try to take off the correct unifix block. If they get it right, they keep the unifix block. If incorrect they need to place it back.

## Remove it

### Posted by Perri Wilkinson | Posted in Addition, Place Value, Subtraction | Posted on August 29, 2017

Materials:

• Tens frames
• Unifix
• 10 sided dice

Students work in groups of 4-5 and start with 10 unifix on each of their tens frame. They each roll the dice and take that many away from their own tens frame, saying the equation e.g. 10 subtract or take away 2 is 8. Once each student has taken away a number, they need to look at each other’s board. Ask students to say their own number aloud in order from smallest to highest, highest to smallest and discuss numbers that are in the middle and what is the difference between highest and lowest etc. This activity encourages students to look at their own number in relation to their group members and think about the place value of each number. It can be reversed to include addition.

## Fraction Frenzy

### Posted by Perri Wilkinson | Posted in Decimals, Fractions, Place Value | Posted on August 28, 2017

Taken from Paul Swan’s book: Kids, Calculators and Classrooms

Aim: For students to get 3 uninterrupted decimals in a row on the number line.

Students choose 2 numbers from the number cards 1-12 to create a fraction. They must then convert it to a decimal using a calculator and mark the decimal on the number line game board. The winner is the person who can get 3 decimals in a row on the number line without the other player interrupting it.

Fraction frenzy-1a333a3

## Understanding decimals

### Posted by Perri Wilkinson | Posted in Decimals, Place Value | Posted on August 28, 2017

This is a great way to help students understand tenths and hundredths and how small they are compared to 1 whole.

Ask student to create a model of 1 MAB with Plasticine. With a plastic knife, cut it into tenths. Then discuss the concept of hundredths and how this would look. Ask them to make 1 hundredth by cutting one tenth into ten equal pieces.

## Rock Paper Scissors

### Posted by Perri Wilkinson | Posted in Addition, Division, Factors, Four Operations, Multiplication, Number, Place Value, Prime Numbers, Rounding, Subtraction | Posted on August 28, 2017

Warm up activity for number and place value that can be adapted to many concepts.

Students say rock paper scissors and then hold out fingers. They must then perform an operation and say the answer to win.

Variations:

• add the number of fingers
• find the difference between the number of fingers
• multiply the number of fingers
• identify odd or even numbers
• perform one of the operations above and then identify if it is odd or even
• perform one of the operations above and then identify if it is a composite or prime number
• perform one of the operations above and then identify multiples or factors of that number
• multiply the numbers and round to the nearest 10

## Odd and Even

### Posted by Perri Wilkinson | Posted in Addition, Division, Four Operations, Multiplication, Place Value, Subtraction | Posted on August 28, 2017

The aim of this warm up game is for students to try and work out a way to make the final number either odd or even.

Students need a calculator and cards with the digits 0-9 on them.

Students place the cards face up on the table and choose who will be odd and even. Once they have decided who starts, they take it in turn flipping a card over. The first card is the starting number and they enter it on the calculator. That card is then turned over. The next player chooses a remaining card and an operation. They must do that operation with the chosen number on the calculator and continue until there are no cards left. The final number determines the winner, either odd or even.

One rule is that neither player can divide or multiply by 0.

### Posted by Perri Wilkinson | Posted in Decimals, Division, Multiplication, Place Value, Subtraction | Posted on August 28, 2017

This is a warm up activity involving calculators for place value, decimals, subtraction multiplication and division.

Students begin by entering a 4 digit number into their calculator. These 4 digits are aliens coming down to earth. The students’ mission is to shoot them down in ascending order but this can only by subtracting the ones. Students will have to change the value of each digit by either multiplying or dividing the number by 10, 100 or 1000.

For example:

• A student starts with the number 5236.
• The first number they have to shoot down is the 2. Therefore, they must divide their number by 100 so that the 2 is in the ones column, e.g. 52.36. Then they can subtract 2, leaving 50.36.
• Next they must shoot down the 3. First the must multiply their number by 10 making 503.6 and then they can subtract 3, leaving 500.6
• Students continue until all digits are gone.

### Posted by Perri Wilkinson | Posted in Addition, Place Value, Subtraction | Posted on August 28, 2017

This is a calculator warm up activity for place value, addition and subtraction.

Students begin by entering a 4 digit number into their calculator. These 4 digits are aliens coming down to earth. The students’ mission is to shoot them down in ascending order by subtracting the numbers one at a time.

For example:

• A student’s number is 5271. They must first get rid of the 1 by subtracting 1. Leaving 5270.
• They must then get rid of the 2 by subtracting 200. Leaving 5070.
• Next they need to get rid of the 5 by subtracting 5000. Leaving 70.
• The last step is to subtract 70. Leaving 0

### Posted by Perri Wilkinson | Posted in Addition, Place Value, Subtraction | Posted on August 28, 2017

This is a great warm up activity  for place value, addition and subtraction.

Each student has a calculator and must enter a 4 digit number (with each digit being a different number). The students then take it in turn asking each other for a number. If the student has that number, they must subtract it from their number and the student asking must add it to theirs. They continue this until either one person has a 5 digit number (making them the winner) or one person has a 3 digit number (making them the loser).

For example: Student A starts with 5831 and Student B asks for an 8. Student A must subtract 800 from his number using the calculator, leaving 5031, and Student B adds 800 to their number.

Support: starting with a 3 digit number, recording their working out

Extension: higher digits, decimals, explaining their strategy to win

## Barkle

### Posted by Perri Wilkinson | Posted in Addition, Number, Place Value | Posted on September 14, 2016

This is a great game to build on the students place value and addition skills.

Students need 6 dice and play in small groups.

Rules:

– You must reach at least 500 before end your turn and record your points.
– Set aside any dice that are worth points after each roll.
– If you roll the dice and do not receive any points you have Barkled! Pass the dice to the next person.
– The first player to get to 10,000 points wins!

Point system is on the Barkle game cards

barkle