 # Multiply by 2 Digit Numbers

## Presentation on theme: "Multiply by 2 Digit Numbers"— Presentation transcript:

Multiply by 2 Digit Numbers
When would you need to multiply by a 2 digit number?

Multiply by 2 Digit Numbers
A tiger can eat as much as 40 pounds of food at a time but it may go for several days without eating anything. Suppose a Siberian tiger in the wild eats an average of 18 pounds of food per day. How much food will the tiger eat in 28 days if he eats that amount each day? Use place value and regrouping to multiply.

Multiply by 2 Digit Numbers

Multiply by 2 Digit Numbers

Multiply by 2 Digit Numbers
28 X 18 = ________ Estimate _____ X _____ = _______

Multiply by 2 Digit Numbers
28 X 8 ones = ______ones X 1 ten = _______tens or X _____ones Add the partial products, to find the final answer. So, on average, a tiger eats _______pounds in 28 days

Multiply by 2 Digit Numbers
REMEMBER Use patterns of zero to find the product of multiples of 10. 3 x 40 = x 40 = _______ 3 x 400 = ________ x 40 = _________

Multiply by 2 Digit Numbers
A Siberian tiger sleeps as much as 18 hours a day, or 126 hours per week. About how many hours does a tiger sleep in a year? There are 52 weeks in one year. Estimate ______ x _______= __________

Multiply by 2 Digit Numbers
Solve 126 X So, a Siberian tiger sleeps about ________hours in one year. Are there different numbers you could have used to find an estimate that is closer to the actual answer?

Multiply by 2 Digit Numbers
When you multiplied 126 and 5 tens in the previous problem, why does its product have a zero in the ones place? Explain

Multiply by 2 Digit Numbers
Complete to find the product x43 x38 64x____ 571x____ 64x 571x____

Multiply by 2 Digit Numbers
Estimate , then find the product. x x x45

Multiply by 2 Digit Numbers
Copy and Solve. Then See Me 54 x x 36 204 x x 25 722 x x 43

Multiply by 2 Digit Numbers
Text page 153 Practice and see me