Homework Comments Can you… Show why x 0=k is not true for nonzero x?

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Presentation transcript:

Homework Comments

Can you… Show why x 0=k is not true for nonzero x?

Explain what is wrong: “50 ÷ 7 is the same as 50 ÷ 10, (which is 5) then because I adding 3 to the divisor I now need to subtract 3: = 2.”

Estimate Show 3 different ways to find: Estimate ÷ 82. Show ÷ 82 using the scaffolding method.

35 49 is about Think: = 1500, and 5 50 = 250, so Methods: rectangular area, lattice multiplication, Egyptian Duplation, any of the methods used by the kids ÷ 82: 82 1 = 82; = 820; = 8,200; = 82,000. So, the quotient is between 100 and 1000, and is closer to 100. Now: 8 3 = 24, so guess 300.

27984 ÷ = 82; = 820; = 8, )

I’m thinking of a number. It is less than 50. When I divide it by 8, I get a remainder of 5. But when I divide it by 7, I get a remainder of 2. Use the manipulatives to find my number.

Do I Understand??? Given:4 7 X __ Question: Without doing any work, what is 30 47? How do you know?

Do I Understand? Given: 208 R 7 18 ) Question: Without doing any work, what is ? How do you know?

Make this true for order of operations 12 ÷ = 30 What other values can we get using 12 ÷ ?