Making Conceptual Lacking a or ‘feel’ unrealistic of unit ‘sense’ estimates of quantities or standard Units length, weight units of Estimations and time. measurements Drawing Conceptual unrealistic angle estimates Addition of hours Added units of Conceptual Does not differentiate and minutes length time in the same base 10 numeration way as for base from the minutes and 10 numeration numeration Multiplication of Writing a product Conceptual Does not understand km, m and cm by which is not the meaning of given the factor. matching with a prefix prefix Simplifying Incorrect Thinking that algebraic expression placing of Conceptual brackets have no by collecting like effect on the signs of brackets when terms the grouped terms. collecting like terms Algebra Incorrect opening of brackets Making direct Ignoring the Thinking that a substitution in an coefficient of the variable is algebraic expression variable or term independent of its coefficient
Conceptual Units Estimations Making unrealistic estimates of length, weight and time. Conceptual Lacking a ‘feel’ or ‘sense’ of unit quantities or standard units of measurements Drawing unrealistic angle estimates Conceptual Addition of hours and minutes length Added units of time in the same way as for base 10 numeration Conceptual Does not differentiate base 10 numeration from the minutes and numeration Multiplication of km, m and cm by the factor. Writing a product which is not matching with a prefix Conceptual Does not understand the meaning of given prefix Algebra Simplifying algebraic expression by collecting like terms Incorrect placing of brackets when collecting like terms Incorrect opening of brackets Thinking that brackets have no effect on the signs of the grouped terms. Making direct substitution in an algebraic expression Ignoring the coefficient of the variable or term Thinking that a variable is independent of its coefficient
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