3-Digit Number Sense( Week 24 Evaluation) 1. Round 489 to the nearest hundred's place. 2. Write down all the three digit numbers that can be made using 4, 5, and 8. Separate each number by a comma. 3. By turning a page upside down, some page numbers still show the exact same numbers. Examples of such page numbers are 1, 69, 808,.... How many such numbers from 1 to 909? 4. 431 is a 3-digit number with each digit less than the digits in higher place values, i.e 3 < 4 and 1 < 3. How many such 3-digit number(s) are there between 800 and 899? 5. How many 3-digit numbers are there with the sum of digits equal to 1? 6. 232 is a symmetric 3-digit number with the ones digit equal to the hundreds digit. How many such 3-digit number(s) are there between 480 and 549 inclusively? 7. 263 is a 3-digit number with the product of the ones digit and the hundreds digit equal to the tens digit, i.e 2 × 3 = 6. How many such 3-digit number(s) are there between 390 and 439 inclusively? 8. 431 is a 3-digit number with digits in descending order from left to right, i.e 3 < 4 and 1 < 3. There are 4 3-digit number(s) between 550 and 630 inclusively with digits in descending order. What are these 4 numbers? 9. 113 and 311 are a pair of 3-digit numbers with digits reversed on each other. Their difference is 311 − 113 = 198. How many pairs of such 3-digit numbers (with the difference of 198) are there? 10. 624 and 257 are two 3-digit numbers where the difference between the ones digit and the hundreds digit equals to the tens digit, i.e 6 − 4 = 2 and 7 − 2 = 5. How many such 3-digit number(s) are there between 630 and 659 inclusively? |