Day 4

• Again, and on all the following days, rule out the use of 0 as a first digit in today’s work.
• Your questions for the first set could focus on explaining the thinking that led to the answer. How did you decide on your answer? What would the next number bigger (or smaller) be? Does that meet the criteria? Looking at all the answers, what pattern in 0 and 9 do you see?
• Write the biggest one-digit number possible. Ask someone to read it.
• Write the smallest two-digit number possible. Ask someone to read it.
• Write the biggest two-digit number possible. Ask someone to read it.
• Write the smallest three-digit number possible. Ask someone to read it.
• Write the biggest three-digit number possible. Ask someone to read it.
• Write the smallest four-digit number possible. Ask someone to read it.
• Write the biggest four-digit number possible. Ask someone to read it.
• Write the smallest five-digit number possible. Ask someone to read it.
• Write the biggest five-digit number possible. Ask someone to read it.
• Write a six-digit number with 7 in the thousands place. Ask each student to read the number written by the student on the right.
• Write a three-digit number bigger than 995. Ask each student to read the number written by the student on the right.
• Write a seven-digit number with 6 zeros in it. Ask each student to read the number written by the student on the right.
• Write a seven-digit number. Ask each student to read the number written by the student on the right.
• Write a seven-digit number larger than the one you just wrote, if possible. Ask each student to read the number written by the student on the right.
• I will say a number. Write the next number bigger than the one I say: 9 19 29 39 59 79 99 199 299 399 499 599 699 799 899999
• I will give you two digits, 1 and 9. Write all the numbers you can, in order from smallest to largest.
• I will give you three digits, 7, 2 and 5. Write all the numbers you can, using those three digits. Write the numbers in order from smallest to biggest.
• Doubling: Start with 5. Double it, then double the answer, then double that answer. Keep going until the time is up. (Allow about two minutes.)
• Repeat, starting with 2.
• Repeat, starting with 3.
• Thanks. You may sit down again.