Simple Equations wiht addition and subtraction (constants: 2,4,5,10)
Simple Equations wiht addition and subtraction (constants: 2,9,10,20)
Simple Equations wiht addition and subtraction (constants:2,9,20,30)
Simple Equations wiht addition and subtraction (constants: 2,9,30,40)
Simple Equations wiht addition and subtraction (constants:2,5,6,10,2,5)
Simple Equations wiht addition and subtraction (constants: 2,9,10,25,2,9)
Simple Equations wiht addition and subtraction (constants: 2,9,25,50,2,9)