Riley asked how many possible 4 digit and 6 digit PIN numbers there are using the numbers 0-9. We talked through there being 10 possible numbers for the first digit, 10 possible numbers for the second digit, so possible numbers for the third digit and 10 possible digits for the fourth digit, leading to 10x10x10x10=10000 possible combinations.

Math

• Riley learned about the concept of possible combinations in creating 4-digit and 6-digit PIN numbers using the numbers 0-9.
• Riley understood that there are 10 possible numbers for each digit in the PIN.
• Riley grasped the concept of multiplying the number of possibilities for each digit to calculate the total number of combinations.
• Riley correctly calculated that there are 10x10x10x10=10000 possible combinations for a 4-digit PIN.

For continued development, Riley can explore more complex combinations and permutations using larger sets of numbers or letters. Riley can also practice using these concepts in real-life scenarios, such as calculating the number of possible outcomes in games or puzzles.

Book Recommendations

• The Math Curse by Jon Scieszka and Lane Smith: In this humorous book, the main character is convinced that everything around them is linked to math. It introduces various math concepts in an engaging way.
• Math-terpieces by Greg Tang and Greg Paprocki: This book combines art and math to help children develop critical thinking and problem-solving skills. It presents math concepts through famous works of art.
• Math for All Seasons by Greg Tang and Harry Briggs: This book introduces math concepts through rhymes and colorful illustrations, making it a fun and accessible way for children to explore math.