linear sequence, 3, 8, 13, 18, 23, 28, …, negative number, A number less than zero. You use a minus (-) sign to show a negative number., factor, A whole number that divides exactly into another number., square number, A number you get when you multiply the whole number by itself. (số tự nhân chính nó), products, The answer is when two or more numbers are multiplied., difference, The “jump size” between terms., counter-example, An example that shows a general statement is wrong., no chance, An event is impossible., decompose, Break down a number into parts., associative law, When more than two numbers are added or multiplied you can do the calculations in any order.

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