Finding Doubles

Another open ended play challenge. This time they had 15 minutes to make as many doubles as they could. First, we recapped what they knew about doubles:

To get a double of a number, we add the same number to itself. For example, double of 3 is 3+3=6. The final quantity is double the initial.

Another way of doubling, is to multiply the number by 2. For example to double 3, or make it twice as big, you can calculate 3×2=6.

Resources

Fraction rods
Bath crayons
Base 10 set
Numicon
Log slices with numbers and +, x and = written on
Homemade Numberblocks characters
Grimm’s small rainbow balls
Grimm’s rainbow sorting board
Money
Home made ten grid
Buttons
Wooden dolls

Method

Finny found the first double, using the fraction rods. He doubled one half.

He used a bath crayon to help him write his sum out on the tray.

Finny then moved on to doubling 30. He used some ten rods from his base ten set to demonstrate.

Next, he doubled 9 and used the Numicon to show his working out.

Meanwhile, Ioan used his homemade Numberblocks to double 7.

Finny decided to double Cian’s wooden ball set, which had 12 balls in it.

Ioan doubled some notes of money.

Ioan finished off with the tattered old 10 grids that he made last year. They originally surrounded all the push out pieces in our Guess Who game, he just cut them to size. He had 6 buttons to double.

Finny’s final example involved some of their wooden dolls. He worked out what double 8 was.

They completed their tray with a reminder that doubling means you multiply by two.

DfES Outcomes for EYFS and National Curriculum (2013)

Numeracy Year 1 programme of study

Number – addition and subtraction

read, write and interpret mathematical statements involving addition (+), subtraction (–) and equals (=) signs
add and subtract one-digit and two-digit numbers to 20, including zero

Number – multiplication and division

solve one-step problems involving multiplication and division, by calculating the answer using concrete objects, pictorial representations and arrays with the support of the teacher.