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Estimate
Standard Algorithm
Tens Facts for Help
Same Value As
Grab Bag
100
Estimate the sum of 859 and 405
What is 1,270 or 1,300
100
Add 45103+4206
What is 49,309?
100
The tens fact that would help you solve 48x5
What is 48x10?
100
9x11 is the same value as...
11x10 - 11x1
100
9x35=
What is 315?
200
Estimate 740+311
What is 1,000 or 1,050
200
Add 67,024+37,982
What is 105,006?
200
The tens fact that would help you solve 23x5
What is 23x10?
200
32x5 is the same value as...
32x10 - 32x5
200
37x4=
What is 148?
300
Estimate the total of 323 and 472
What is 800 or 790?
300
Add 10,668+1,234
What is 11,902?
300
How would you use a tens fact to solve 32x6?
What is (32x10) then minus (32x4)?
300
49x5 is the same value as...
49x10 - 49x5
300
9x81=
What is 729?
400
Estimate the sum of 904+291
What is 1,200 or 1,190?
400
Add 20,128+10,542+2,010
What is 32,680?
400
How would you use a tens fact to solve 35x9?
What is use 35x10 then minus 35x1?
400
9x18 is the same as...
10x18 - 1x18
400
24x7=
What is 168?
500
Estimate the sum of 322 and 426
What is 600 or 640?
500
Add 222,222+444,444+999,999
What is 1,666,665?
500
What tens fact would help you solve 564x7
What is solve 564x10 then subtract 564x3?
500
28x5 is the same as a) 28x10 divded by 2 B) 20x10 + 8x10
A
500
45x6=
What is 270?