Such problem sums starts with 2 parties, one being a multiple of another at first.
Both parties undergo addition or subtraction and results in both having equal value at the end.
This type of problem sum will require student to use before and after models to represent visually the starting multiples of one another at the "Before" model and the "After" model to represent the changes and how both became "Equal".
These questions are common in Section C of P4 exams and Paper 1 of P5 exams.
Calculator usage is not allowed.
Chris have 3 times as many buttons as Bailey at first.
After Chris used 30 buttons making shirts and Bailey used 4 buttons for making pants,
they had the same number of buttons left.
How many buttons did Chris have at first?
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