Objectives: Students will be able to: Multiply Multi-digit numbers using the standard algorithm Divide Multi-digit numbers using the standard algorithm Multiply and Divide by Powers of 10

ANSWERS

Dividing Difficult Large Numbers 31) will not go into 1 31 will not go into will go into 171

Dividing Difficult Large Numbers 31) 1719 To figure what your first number will be cover the 1 in 31 & the 1 in 171.

Dividing Difficult Large Numbers 31) 1719 Now ask how many 3’s will go into 17.

Dividing Difficult Large Numbers 31) 1719 Be sure to put that number directly above the 1 not the 7. 5

Dividing Difficult Large Numbers 31) 1719 Now multiply the 5 x 31 and place it under the

Dividing Difficult Large Numbers 31) x

Dividing Difficult Large Numbers 31) Now cover up the 1 in 31 & the 9 in 169

Dividing Difficult Large Numbers 31) Ask how many 3’s will go into 16.

Dividing Difficult Large Numbers 31) Place that number next to the 5 in your quotient. 5

Dividing Difficult Large Numbers 31) Now multiply 31 x 5. 5

Dividing Difficult Large Numbers 31) Subtract & your answer is 55 R14

Check It Using the Inverse of Division: 31 Multiply the divisor by the quotient. X Add Remainder to the product 1719 Your answer should match the original dividend

Multiplying and Dividing by powers of ten MEAP REVIEW

What are the PLACE VALUES of the digits in this number?

So that means

The decimal point just separates the whole numbers from the decimal fractions

What happens when I multiply this number by 10 ?

Each digits value will become 10 times bigger so the digits move LEFT into the next column

x 10 = Multiplying by 10 It LOOKS like the decimal point moves one place to the right. (and that is how many teachers ask you to think of it)

Multiplying by 10 Moving the digits one place to the LEFT looks the same as moving the decimal point one place to the RIGHT

More Multiplying and Dividing Digits Move( LOOKS LIKE ) Decimal Point Moves x10One place to LEFTOne place to RIGHT x100Two places to LEFTTwo places to RIGHT ÷ 10One place to RIGHTOne place to LEFT ÷ 100Two places to RIGHTTwo places to LEFT

Thanks for watching. I hope I haven’t LEFT you confused but I thought we should get this RIGHT To practice multiplying and dividing by multiples of ten, click on this website: 37.html

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