Using Basic Facts
TRIPLE JEOPARDY! 3 x 70
210
A library has 60 shelves. Each shelf has 20 books. Write an equation that can be used to find the total number of books on the shelves.
60 x 20 = b
4 x ____ = 320
80
What is the best estimate for 49 x 28 (Equation AND Answer)
50 x 30 = 1,500
What are the Partial Products for 30 x 12
30 x 2 = 60
30 x 10 = 300
50 x 9
450
The dentist ordered 20 boxes of toothbrushes. There are 12 toothbrushes in each box. Write an equation to find how many toothbrushes the dentist ordered.
20 x 12 = T
TRIPLE JEOPARDY! 50 x _____ = 35
7
What is the best estimate for 37 x 19 (Equation AND Answer)
40 x 20 = 800
What are the Partial Products for 40 x 23
40 x 3 = 120
40 x 20 = 800
40 x 60
2,400
DOUBLE JEOPARDY! It took Anne 27 hours to drive from her home to Miami. She drove about 51 miles each hour. Write an equation that shows the best way to estimate the distance from Anne's home to Miami.
30 x 50 = M
30 x _____ = 1,800
60
What is the best estimate for 56 x 32 (Equation AND Answer)
60 x 30 = 1,800
What are the Partial Products for 23 x 15
3 x 5 = 15
3 x 10 = 30
20 x 5 = 100
20 x 10 = 200
70 x 80
5,600
A baker uses 11 eggs in each batch of cookies. Write an equation that shows the best way to use compatible numbers to estimate the number of eggs the baker uses for 24 batches of cookies?
10 x 25 = E
OR
11 x 25 = E
70 x ______ = 4,200
60
What is the best estimate for 83 x 46 (Equation AND Answer)
80 x 50 = 4,000
What are the Partial Products for 56 x 34
6 x 4 = 24
6 x 30 = 180
50 x 4 = 200
50 x 30 = 1,500
90 x 70
6,300
An art teacher ordered 53 boxes of pencils, each box had 25 pencils. A music teacher ordered 38 boxes of pencils, each box had 75 pencils. Write equations to show the difference between the pencils that the art and music teacher ordered. (3 equations total)
53 x 25 = A
38 x 75 = T
T - A = D
_____ x _____ = 2,700
30 x 90
What is the best estimate for 77 x 66 (Equation AND Answer)
80 x 70 = 5,600
What are the Partial Products for 62 x 47
2 x 7 = 14
2 x 40 = 80
60 x 7 = 420
60 x 40 = 2,400