

Mental arithmetic  

D1:
Cuisenaire Rods
with number lines. The
on and off buttons. Turn the
grid on or off. 
D2: Find the difference between two numbers
D3: Find the total of two numbers


D4:
100grid activities This number grid can be used to identify hidden numbers. Click on a square to reveal the number. Useful for addition and subtraction activities using a normal 100grid or number sequence activities using a random grid. There are four types of number grid: 1 to 100, 1 in the topleft hand corner, 100 in the bottomright. 100 to 1, 100 in the topleft hand corner, 1 in the bottomright. A random grid starting with smallest number in the topleft. A random grid starting with highest number in the topleft. 

Mental arithmetic 'tests' each comprising ten questions on addition, subtraction, multiplication, division, place value, sequences, fractions, measures, time and money.
A mental arithmetic 'test' comprising ten questions on addition and subtraction. 


Hidden numbers and missing numbers  
D10: Hidden
numbers 1
D16:
Hidden numbers 2 Click on
the options buttons to change the sums. The option buttons generate the
following types of sum:
D23:
Add three 3digit multiples of 100


D44: Number
triangles 
Random number generator: target board  
D30:
A flexible whiteboard resource which
generates 24 different sets of numbers; similar to a target board. The
resource will open in a new window. Options include:
Select
the type of numbers to be generated by clicking on the numbered buttons
at the top. The colour of the number can be changed. Select one of 8 colours then click on a number. The numbers
can be put arranged in a grid, click this button The numbers can be grouped by dragging them about. The numbers can be discarded by dragging them to the bin. Children
can use the resource to match pairs: A clock
starts when a set of numbers has been generated. The clock can be hidden
or shown (click the green clock button). It can be stopped by clicking
the 'stop the clock' button! 
Missing symbols: use the symbols >, < and =  
Decide which symbol to use

SATtype questions  








Work out the differences between numbers.

Solving problems  
Solve puzzles and problems such as  
Missing number problemsolving activities Sum, Difference and Product
Sum puzzle


Complete the magic squares


Triangle
puzzle


Use this 1 to 10 dartboard to do some mental arithmetic. First decide on the finshing score then click on the 'throw' button. The darts can be dragged about and thrown by releasing the mouse button. How many ways are there to finish on 37? 42? Remember the last dart thrown must be a double or a bullseye. 
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