Multiplication by Multiples of 10
54 x 10
540
What is a good estimate for 12 x 9
10 x 10 = 100
20 x 30
600
9,000 x 600
Roger has 5 sons. Each of his sons has a sister. If so, how many children does Roger have?
6. All of the sons have the same sister!
40 x 9
360
What is a good estimate for 9 x 32
10 x 30 = 300
50 x 70
3,500
8,000 x 80,000
640,000,000
Which baseball team won the World Series in 2020?
Los Angeles Dodgers
80 x 7
560
What is a good estimate for 89 x 42
90 x 40 = 3,600
90 x 80
7,200
500 x 6,000
3,000,000
When can you add 2 to 11 and get 1 as the correct answer?
When you are talking about a clock or time! (like, from 11am + 2 hours is 1pm)
90 x 10
900
What is a good estimate for 51 x 79
50 x 80 = 4,000
60 x 50
3,000
70,000 x 7,000
490,000,000
Who is the Director of Technology for OLMC?
Mr. Lane
60 x 70
4200
What is a good estimate for 903 x 698
900 x 700 = 630,000
60 x 60
3,600
9,000 x 700,000
6,300,000,000
What letter does every odd number have in it when it's spelled out?
an "e"