Addition
Subtract 279 from 500.
221
Estimate the difference of 765 and 332. Round each number to the nearest ten to estimate.
780-330 = 450
Maya wants to buy a new art set and a sketchbook. The art set costs $278, and the sketchbook cost $52. How many dollars does Maya need to save to buy both items?
$330
When adding 2,927 and 4,815, what place values need to be regrouped?
Ones and Hundreds
Describe how you use place value blocks to regroup to solve the subtraction problem below. What is the difference?
956 - 238
I can regroup _____ into ______.
I can regroup one ten into ten ones.
Difference: 718
Estimate the sum of 640 and 170 by rounding to the nearest hundred.
600 + 200 = 800
A school library has 745 books. The library has 428 fiction books. The rest are nonfiction books. How many nonfiction books does the library have?
317 nonfiction books
Find the sum of 337 and 243. Use place value and find the sums of the hundreds, tens, and ones.
Sum of the hundreds:
Sum of the tens:
Sum of the ones:
Sum of the Hundreds: 500
Sum of the Tens: 70
Sum of the Ones: 10
Total Sum: 580
Lena subtracted numbers as shown below.
538 - 247 = 346
Lena regrouped 1 hundred to make 18 tens. She then regrouped 1 tento make 13 ones.
What mistake, if any, did Lena make?
A. The correct difference is 291. Lena regrouped incorrectly when she changed 1 hundred into tens.
B. The correct difference is 336. Lena subtracted incorrectly in the tens place.
C. The correct difference is 346. Lena did not make any mistakes.
D. The correct difference is 436. Lena regrouped the hundreds incorrectly.
A. The correct difference is 291. Lena regrouped incorrectly when she changed 1 hundred into tens.
A school fundraiser earned $8,246 in September. In October, the fundraiser earned $5,873. What was the difference, in dollars, between the amount earned in September and October..
$2,373
Use the addition work shown.
Explain the mistake made when solving the sum.
4652
+ 3714
7366
The regrouped hundreds was not added when finding the sum of the thousands.
Correct sum: 8,366
Draw a bar diagram to represent 456 + J = 619.
Teacher will draw bar diagram.