Vocabulary

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Place Value - position of a digit in a number that tells the value of the digit

Millions - located to the left of the hundred thousands place

Period - in a number this a group of three digit that are separated by commas/three place values

expanded form - a number written as a sum of the whole number (342= 300+40+2)

greater than - symbol to indicate the first number in an expression is larger (78>54)

less than- symbol to indicate the first number in an expression is smaller (54<78)

rounding - looking at a place value and the number to the right to round

conjecture - a statement believed to be true