When you find an answer without using computational aids. In other words, you do math in your head
What is mental math
100
Use rounding to the hundreds place to estimate the answer to: 408 + 873
What is 1300
100
If I had 15 students in my class and I was buying cupcakes so each student could have ONE. How many boxes of cupcakes would I need to buy if 10 cupcakes come in each box?
What is 2
100
59 + 44 =
What is 103
200
Mental Math strategy in which you think that one of the factors of the product is money
What is thinking money
200
Use rounding to the hundreds place to estimate the answer to: 946 - 253
What is 700
200
A typical pride consists of 15 lions. If a nature preserve has 180 lions, then how many prides are on this preserve?
What is 12
200
540 - 200 =
What is 340
300
This is a strategy in which you create compatible numbers by adjusting the actual numbers in a sum or difference.
What is Compensation
300
Use rounding to the tens place to estimate the answer to: 6 x 18
What is 200
300
You have been given a bid for a website design. Estimate the total cost below. You can round each amount to the nearest $500
$1525 + $3875 + $4435 + $4125 =
What is $14,000
300
230 + 725
What is 955
400
estimation technique that considers only the leading digits, which are the digits in the left-most place value
What is Front End Estimation
400
Round to the hundreds place to estimate the answer to:
209 / 143
What is 2
400
Using FRONT-END estimation, estimate the sum of the following numbers.
351 + 429 + 852 +354 =
What is 1800
400
109 + 950
What is 1,059
500
Mental math strategy in which you multiply each place digit separately and then add the results
What is Front-ended multiplying
500
Round to the nearest hundreds to estimate the answer to:
489 x 724
What is 350,000
500
Your checking account balance is $1,476. You deposit checks for $407 and $1239. Use estimation or mental math to decide whether there is enough money to cover a check for $3,000. Explain your reasoning.