Multiply by 2-digit Numbers

Front

What is the process for estimating the product of two numbers?

Back

To estimate the product of two numbers, round each number to the nearest ten or hundred, then multiply the rounded numbers.

Front

How do you multiply a 2-digit number by a 1-digit number?

Back

Multiply the 1-digit number by each digit of the 2-digit number, starting from the right, and then add the results.

Front

What is the estimated product of 62 and 77?

Back

The best estimate is 60 x 80 = 4,800.

Front

How do you calculate the total number of items when given boxes and items per box?

Back

Multiply the number of boxes by the number of items in each box.

Front

If there are 38 boxes of pencils with 100 pencils each, how many pencils are there in total?

Back

38 boxes x 100 pencils/box = 3,800 pencils.

Front

What is the best estimate for the total cost of 12 cat cages costing $27 each?

Back

The best estimate is 12 x $30 = $360.

Front

How do you find the total amount raised from selling items at a fixed price?

Back

Multiply the number of items sold by the price per item.

Front

If 62 books of raffle tickets are sold for $18 each, how much money is raised?

Back

62 x $18 = $1,116.

Front

What is the total number of dog treats if 24 bags contain 16 treats each?

Back

24 bags x 16 treats/bag = 384 treats.

Front

How do you round numbers for estimation?

Back

Identify the place value you want to round to, then adjust the number up or down based on the digit to the right.