3 Digit x 1 Digit
2 Digit x 2 Digit
3 Digit x 2 Digit
Problem Solving
Estimating
100

Fill in the blank

     4 2 8

x         3

----------- 

? , ? 8 4

1, 2 8 4

100

Fill in the blank

   4 4 

x  3 1 

_______

       ? ?

+  1 3 2

------------

     1 7 6

44

100

Fill In The Blank

   3 2 8

x    9 1

----------

      3 2 8

+ 2 9 5 2

_____________ 

    3, 2 ? ?

8 & 0

100

What is the name of the answer to a multiplication problem.

Product

100

Explain why 100 x 2000 is either a good or bad estimate for 12 x 180?

No, the estimate would be far too large.

200

Is the following equation true or false?

7 0 3 x 6 = 4,218

True!

200

Is the following equation true or false? Explain your reasoning.


20 x 20 = 40

False, 400

200

Is the following equation true or false?

8 6 3

x  1 3 

----------

2, 5 8 9

+  8 6 3

__________

 3, 4 5 2

False, It should have been 2,589 + 8,630 = 11,219 there was not a zero in the second number on the bottom.

200

There are four seasons in one year, how many seasons are in 110 years?

440 seasons

200

What is a good estimate for 497 x 6?

500 x 6 b/c single digit stays the same and round to nearest hundred.


300

Find the error

4 5 8

x    4 

--------

1,632

They didn't carry the thirty into the the 50 x 4 

Should have been 32 + 200 + 1,600 = 1,832

300

Find the error

  1 7

x 7 1 

-------

      1 7

+ 4 9 0 

__________

 5 0 7

70 x 17 is 1,190 

not 490

300

Find The Error

 2 4 0

x  5 5

_________

         1 2 0 

+ 1 2 0 0 0 

There is a missing zero in the first product.

300

134 cars went around the roller coaster track and each car on the roller coaster held 4 people. What is the number of people that went on the ride?

536 people

300

Describe the difference between an overestimate and underestimate. 

Overestimate has an answer larger than the product while underestimate has a smaller answer than the actual product.

400

Which of the following answers is correct for

2 5 1 x 3  =

a) 2 3 5

b) 6 0 3 

c) 7 5 3 

d) 7 7 7

C

400

Which of the following answers is correct for 

49 x 17 =

a) 6 8 

b) 4 9 0 

c) 8 1 1

d) 8 3 3 

D

400

Which of the following answers is correct for

6 5 0 x  3 3 =

a) 20, 040

b) 21, 450

c) 2,045

d) 2,150

B

400

Mrs. Willis is planning a field trip and will need 13 vans for the fifth graders. Each van can hold 12 people. How many students does she intend to bring?

156 people

400

Rounding to the nearest hundred, what is the best estimation for this equation?

   1 0 5 x 2 9 5

100 & 300

Estimate is 30,000

500

Solve the following

4 5 4 x  4 = 

1 , 8 1 6

500

Solve the following

   5 3 x  4 2 = 

2,226

500

Solve the following

4 5 4 x  4 0 =

18 , 160

500

Mr. Craine has fifty bags of golf balls that each have a dozen in them. How many total golf balls does he have?

600

500

Explain Why Estimating Is Important For Multiplying Numbers.

Helps us learners quickly find what our answer should be around.

M
e
n
u