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Summary I understand that estimate decimal numbers help finding answers and do easier to done faster. And can help check if your answer is correct, you can applied counting money to buy something like a Pepsi or vegetables
Summary of Decimals  I understand that decimal systems let us write an number larger or small and that using decimal point numbers can be put left or right of a decimal number and that the decimal number is the most important part of decimal number because without that we get lost. The world decimal means is based on 10 from Spanish decima. Sometimes we say decimal that is not relationate with decimal numbering.