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Rounding Numbers Ebelver Lewis 3 rd Grade Math. TEKS 3.5A round whole numbers to the nearest ten or hundred to approximate reasonable results in problem situations Supporting Standard 3.14D use tools such as real objects, manipulatives , and technology to solve problems.
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Rounding Numbers Ebelver Lewis 3rd Grade Math
TEKS 3.5A round whole numbers to the nearest ten or hundred to approximate reasonable results in problem situations Supporting Standard 3.14D use tools such as real objects, manipulatives, and technology to solve problems
How to Round Numbers Decide which is the last digit to keep Leave it the same if the next digit is less than 5 (this is called rounding down) 0 1 2 3 4 The PLACE being rounded “stays” the same. (EXAMPLE: 53 rounded to nearest 10 will stay at 50)
But increase it by 1 if the next digit is 5 or more (this is called rounding up) 5 6 7 8 9 ( Example: 57 rounded to nearest 10 will “go up” to 60)
Practice ROUND S TO (stays) 20 451 ROUNDS TO (stays) 450 ROUNDS TO (stays) 20 734 ROUNDS TO (stays) 730 ROUNDS UP 30 886 ROUNDS UP 890 29 ROUNDS UP 30 978 ROUNDS UP 980
the game……………... Students will self assess by playing “Rounding Run”…. Students will predict whether a number should be rounded “up” or “down.” The answers will appear after the numbers are hit by the runner. EBL