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1 +1 2=4 1 =— 1 + 8— — + 9876. 5 4 3&2 1 = ? — = 6 8 ? 8 ✹ 0 . 5 = 0.50 = 0 . 5 0 0 ✹ 123.4 5 6 7 8 9Reading 3— ✹ 2 4 — 2 Writing Decimals Stumpers Challenge students with these weekly decimal problems. LEARNING OBJECTIVE Directions Students use logical reasoning and knowledge of place value to solve number puzzles. 1. Review decimal place value. Tens Ones Decimal Point Tenths Hundredths 2 1 . 4 5 3 7 . 0 8 5 . 6 GROUPING Whole class MATERIALS Go over how each decimal is read and written: We say, “Twenty-one and forty-five hundredths.” We write 21.45. We say, “Thirty-seven and eight hundredths.” We write 37.08. We say, “Five and six tenths.” We write 5.6. ✹ Stumpers reproducible (p. 96) ✹ construction paper ✹ scissors ✹ glue ✹ paper and pencil 2. Students use the clues in each problem to find the mystery number. ADVANCE PREPARATION 3. They write the answers using both numbers and words. For instance, 13.97 is also written as thirteen and ninety-seven hundredths. Duplicate one Stumpers reproducible. Cut along lines. Attach each problem to construction paper and display weekly in your math learning center or on the bulletin board. Taking It Further Students may enjoy making their own decimal problems to stump classmates. Place the new Stumpers in your learning center. Assessing Skills Are students writing six tenths as 0.06 or as 0.6? Many students incorrectly reason that since tens are two places to the left of the decimal, tenths must be two places to the right of the decimal. Answers Page 96: 1. 37.51 2. 55.93 3. 26.84 4. 42.24 5. 8.24 6. 11.37 The Great BIG Book of Funtastic Math © Scholastic Teaching Resources 95 Name Date Stumpers Write your answers on a separate piece of paper in both number and word form; for example, 14.37 (number form), fourteen and thirty-seven hundredths (word form). 1. a. b. c. d. e. Who Am I? I have 4 digits, and they all are different. All of my digits are odd. I have a 1 in the hundredths place. I have a 7 in the ones place. The number in the tens place is less than the number in the tenths place. f. None of my digits are 9. Who Am I? I have 4 digits. Each digit is either a 2 or a 4. The numbers in the ones place and tenths place are the same. d. The numbers in the tens place and hundredths place are the same. e. I have a 4 in the hundredths place. 2. Who Am I? a. I have 4 digits, and they are all odd. b. The number in the tenths place is greater than 3. It is a factor of 36. c. The number in the hundredths place is less than 4 and greater than 1. d. The numbers in the ones and tens places are the same and are also factors of 25. 5. Who Am I? a. I have 3 even digits. b. The number in the tenths place when subtracted from 3 equals 1. c. The number in the ones place is 8. d. Divide the number in the ones place by 2 and you will have the number in the hundredths place. 3. Who Am I? a. I have 4 digits, and they are all different and even. b. The number in the hundredths place is half of the number in the tenths place. c. The number in the hundredths place is greater than 3. d. The number in the ones place is 6. e. The number in the tens place is 2. 6. Who Am I? a. I have 4 digits, and they are all odd. b. The 2-digit whole number is greater than 10 and less than 20. When this number is divided into 121, the quotient is also that number. c. The digit in the tenths place is 3. d. Add 4 to the number in the tenths place and you will have the number in the hundredths place. 96 4. a. b. c. The Great BIG Book of Funtastic Math © Scholastic Teaching Resources