Sum Scales
Explore = <, > and pose hidden number Maths Stories.
 Y1: read, write and interpret mathematical statements involving addition (+), subtraction (−) and equals (=) signs
 Y1: add and subtract onedigit and twodigit numbers to 20, including 0
 Y1: solve onestep problems that involve addition and subtraction, using concrete objects and pictorial representations, and missing number problems such as 7 = ? − 9
 Y2: compare and order numbers from 0 up to 100; use =, < and > signs
 Y2: add and subtract numbers [using concrete objects] and mentally, including:
 a twodigit number and 1s
 a twodigit number and 10s
 2 twodigit numbers
 adding 3 onedigit numbers,
 Y2: show that addition of 2 numbers can be done in any order (commutative) and subtraction of 1 number from another cannot
 Y2: recognise and use the inverse relationship between addition and subtraction and use this to check calculations and solve missing number problems
This is intended as a wholeclass teaching tool.
Make an expression on each side of the scales.
Waiting before pressing the test button allows the children time to think.
Then press the middle button to test.
NB: Pressing 'AC' also tests the expressions; it just made sense to let the empty side rise to the top.
Have fun!

Build on the learning with these games:
