Question

Select 2 strategies that we can use to subtract 825-297. Choose 2 answers:

(Choice A) Subtract 828-300
(Choice B) Subtract 897-225
(Choice C) Subtract 825-300

Answer 1

To simplify subtraction between 825-297, we can round the numbers and subtract 828-300 or 825-300, and then appropriately adjust the result.

Step-by-step explanation:

When considering strategies to subtract 825-297, we can apply different approaches that simplify the calculation. Two such strategies involve rounding numbers to the nearest ten, hundred, or thousand to make mental math easier, and then adjusting the result afterwards.

Subtract 828-300: This is an effective strategy because both 828 and 300 are close to the original numbers and are easy to subtract. Start with subtracting the hundreds (800-300=500), then subtract the tens (20-0=20), and lastly subtract the ones (8-0=8). After performing the subtraction, we get 528. Since we added 3 to 825 and subtracted 3 from 297, we need to subtract 6 from 528 to get the correct result, 522.

Subtract 825-300: Similar to the first strategy, we simplify the process by rounding 297 to 300. Then we subtract 825-300 to get 525. Because we subtracted an extra 3, we add 3 back to 525 to get the accurate answer, which is 528.