Addition
Subtraction
Magnitude Estimates
multiplication
Odds and Ends
100
278 + 321 =
What is 599
100
78 - 67 = d
What is d = 11
100
Make a magnitude estimate: 12 x 57= m
What is 10 x 60 = 60
100
What is 17 x 3?
What is 51
100
If 1 inch on a map scale equals 200 miles, how much does 2 inches equal?
What is 400 miles
200
89 + 98 = S
What is S 187
200
290 - 37 = S
What is S = 253
200
make a magnitude estimate: 8 x 79 = N
What is 10 x 80 = 80
200
what is 22 x 13?
What is 286
200
Extend the rule: x 2 + 1 1, 3, 7, __, __, __
What is 15, 31, 63
300
78.09 + 67.9 = S
What is S = 145.99
300
34.7 - 19 = S
What is S = 15.7
300
Make a magnitude estimate: 103 x 77 = V
What is 100 x 80 = 8,000
300
What is wrong in this problem? 27 x 5 --------- 10 35 ------------ 45
What is 20 x 5 = 100 100 + 35 = 135
300
Harry walked 1200 feet to the grocery store. How many inches is that?
What is 14,400 inches
400
100.09 + 123. 12 = M
What is M = 223.21
400
23.56 - 15.09 = S
What is S = 8.47
400
Make a magnitude estimate: 8.9 x 11.2 = C
What is 10 x 10 = 100
400
What is 1.5 x 7?
What is 10.5
400
The movie lasted 1 1/2 hours. How many minutes is that?
What is 90 minutes
500
The answer to an addition problem is called...
What is Sum
500
890 - 78.6 = S
What is s = 811.4
500
Make a magnitude estimate: 99.8 x 34.5 = D
What is 100 x 35 = 3,500
500
What is 3.4 x 33?
What is 112.2
500
Sam read a book for 8 minutes and 30 seconds. How many seconds is that?
What is 510 seconds
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