Partial Differences
Find 337 - 285.
337 --> 300 30 7
285 --> 200 80 5
_____________________
50 2
=52
Estimate and solve 457 - 338
460 - 340 = 120
457 - 338 = 119
What is 825 - 647?
178
Use place value to solve:
493 - 328
165
Use mental math to solve:
332 - 246
86
Use partial differences to solve:
748 - 279
469
Estimate the difference of 765 and 333.
Rounded to Hundreds:
765 to 800 and 333 to 300 = 500
Rounded to Tens:
765 to 770 and 333 to 330 = 440
Select all the correct differences.
A. 689 - 463 = 226
B. 328 - 29 = 247
C. 377 - 195 = 192
D. 1,467 - 1,235 = 692
E. 5,000 - 3,245 = 1,755
A. 689 - 463 = 226
E. 5,000 - 3,245 = 1,755
Find the difference between 256 and 125.
Part A: Choose all the steps you can use to find the difference.
A. Subtract 5 ones from 6 ones.
B. Subtract 2 tens from 5 tens.
C. Regroup 1 ten into 10 ones.
D. Subtract 1 hundred from 2 hundreds.
Part B: Find the difference.
Part A:
A. Subtract 5 ones from 6 ones.
B. Subtract 2 tens from 5 tens.
D. Subtract 1 hundred from 2 hundreds.
Part B: The difference is 131
Use mental math to solve:
815 - 699
116
What are the partial differences of 458 - 176?
200 + 80 + 2
An estimate of 431 - 249 using compatible numbers is 425 - 250 = 175. Would it be reasonable for the exact difference to be 182?
Yes, the estimate 175 is close to 182.
Subtract:
3,264 - 2,899
365
Describe how to use place-value blocks to regroup to solve the subtraction problem. What is the difference?
316 - 226
I can regroup _____ into ________.
The difference is ____________.
I can regroup 1 hundred block into 10 ten rods.
The difference is 90.
Subtract 382 - 148 mentally. Which step should you do first to find the difference?
A. Add 2 to 148 and add 2 to 382
B. Add 2 to 148 and subtract 2 from 382
C. Subtract 8 from 148 and subtract 2 from 382.
D. Subtract 12 from 382 and 12 to 148.
A. Add 2 to 148 and add 2 to 382
Which have a difference of 181? Use place value and partial differences to solve. Select all that apply.
A. 218 - 147
B. 538 - 357
C. 462 - 281
D. 846 - 665
E. 475 - 296
B. 538 - 357
C. 462 - 281
D. 846 - 665
A new dirt bike costs $1,089. It is on sale for $949. How much money does the sale price save?
$140
Select all the correct differences.
A. 760 - 257 = 513
B. 514 - 97 = 417
C. 946 - 750 = 196
D. 2,000 - 1,623 = 377
E. 5,500 - 2,491 = 3,109
B. 514 - 97 = 417
C. 946 - 750 = 196
D. 2,000 - 1,623 = 377
Use place value to subtract 639 from 737. How many times do you have to regroup?
A. 3
B. 2
C. 1
D. 0
B. 2
To subtract 5408 - 2671, which methods will give the same difference? Select all that apply.
A. Subtract 8 from both numbers.
B. Add 29 to both numbers.
C. Subtract 8 from 5408 and add 8 to 2671.
D. Subtract 29 from 5408 and add 29 to 2671
A. Subtract 8 from both numbers.
B. Add 29 to both numbers.
Use partial differences to find:
2,085 - 797
1,288
A company has $9,106 in a bank account. An expense of $3,788 is needed. How much money will be left in the bank account after subtracting the expense?
$5,318
2007 - 1145
862
Put the steps in order to find 756 - 345.
1st Step 2nd Step 3rd Step
Subtract 416 - 5
Subtract 756 - 300
Subtract 456 - 40
1st Step 2nd Step 3rd Step
Subtract 416 - 5 X
Subtract 756 - 300 X
Subtract 456 - 40 X
Choose a method such as compensation, think addition, or a standard algorithm to find 3,264 - 2,899.
Compensation:
Adding 101 to 2,899 is 3,000. Add 101 to 3,264 too. 3,264 + 101 = 3,365.
3,365 - 3,000 = 365