how to write standard form Grade 2?

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Standard form are numbers like 56 and 23, the opposit of expanded form, like (50 +6) and (20 + 3)

Question:Write nine hundred fifty eight in standard form:

Answer: 958.

Write the standard number 67 in words:

Answer: Sixty seven.

Explanation: The decimal numbers we write are the standard form of numbers. There are so many other type of representing numbers. Ex: Roman numbers, expanded form, writting numbers through words, binary number,scientific number.

The reason for the decimal number to be called standard as I believe is its simplicity for all types of calculation and its popularity all over the world. Compare the how you multiply 56*65 in standard form and roman number system.

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