Mastering Integer Multiplication with the Standard Algorithm

This video tutorial explains how to multiply integers using the standard algorithm. It covers the process of multiplying numbers in the ones and tens places, adding zero placeholders, and determining the sign of the product based on the signs of the integers involved. The tutorial includes examples of multiplying integers with different signs and real-world applications of multiplication problems.

Which models were previously used to teach multiplication before introducing the standard algorithm?

• Box model and expanded form model

• Area model and lattice model

• Chip model and number line model

• Grid model and partial products model

What is the first step in the standard algorithm for multiplication?

• Multiply the numbers in the tens place

• Add zero placeholders

• Multiply the number in the ones place by all the numbers on the top

• Carry over the numbers

When multiplying 450 by 230, how many zero placeholders are needed when you get to the hundredth place?

• None

• One

• Two

• Three

What is the sign of the product when multiplying a positive number by a negative number?

• Zero

• Negative

• Positive

• Undefined

What is the result of multiplying -23 by 5?

• 120

• -115

• 115

• -120

If you multiply two negative numbers, what will be the sign of the product?

• Positive

• Negative

• Zero

• Undefined

Calculate the product of 23 and 67, and determine its sign if one number is positive and the other is negative.

• 1540, Positive

• 1541, Negative

• 1540, Negative

• 1541, Positive

What is the product of 87 and 4 if one number is negative and the other is positive?

• 348

• -348

• -334

• 334

How much does it cost to park in the University garage for 12 hours if the rate is $5 per hour?

• $65

• $60

• $50

• $55

If Abbey knits 3 blankets every month, how many blankets can she knit in 26 months?

• 72

• 80

• 78

• 84