Select Yes or No to tell whether the sum is even. 9 + 8 9 + 5 8 + 9 5 + 9

Select the sentences that show the Commutative Property of Addition. Select all that apply.

Select the numbers that round to 300 when rounded to the nearest hundred. Select all that apply.

There are 485 books in the classroom library. Complete the chart to show 485 rounded to the nearest 10. Hundreds Tens Ones

Determine whether 600 or 700 is a better estimate of each sum by dragging and dropping each number sentence into the correct box. Please use each answer only once. 600700 305 + 331 = 355 + 328 = 482 + 214 = 395 + 226 = 305 + 331 = 305 + 331 = 395 + 226 = 395 + 226 = 482 + 214 = 482 + 214 = 355 + 328 = 355 + 328 =

Diana sold 336 muffins at the bake sale. Bob sold 286 muffins. Bob estimates that he sold 50 fewer muffins than Diana. How did he estimate? Complete the explanation. He rounded to the nearest . 336 rounds to and 286 rounds to . The difference of these rounded numbers is .

The table shows how many books each class read. Reading Contest Class Number of books Mr. Lopez 272 Ms. Martin 401 Mrs. Wang 245 Select True or False for each statement. Ms. Martin's class read about 100 more books than Mr. Lopez's class. The 3 classes read over 900 books altogether. Mrs. Wang's class read about 50 fewer books than Mr. Lopez's class. Ms. Martin's and Mrs. Wang's class read about 700 books.

Janna buys 2 bags of dog food for her dogs. One bag weighs 37 pounds. The other bag weighs 14 pounds. How many pounds do both bags weigh? Complete the explanation of how you might solve the problem. I added to 37 to make the friendly number of 40. Since I added to 37, I need to subtract from 14. The difference is . So, the two bags weigh 40 + = pounds altogether.

Choose the property that makes the statement true. The Property of Addition states that you can group addends in different ways and get the same sum.

The table shows the number of sweaters sold online in three months. Susie's Sweater Shop Month Number of Sweaters Sold January 504 February 396 March 173 How many sweaters were sold in January and February? sweaters were sold in January and February.

The table shows the number of sweaters sold online in three months. Susie's Sweater Shop Month Number of Sweaters Sold January 504 February 396 March 173 How many more sweaters were sold in January than March? more sweaters were sold in January than March.

The table shows the number of sweaters sold online in three months. Susie's Sweater Shop Month Number of Sweaters Sold January 502 February 398 March 171 How many more sweaters were sold in February and March than January? more sweaters were sold in February and March than January.

Help Dana find the sum. 242 151 + 361 Select Yes or No to tell Dana when to regroup. Regroup the ones. Add a regrouped ten. Regroup the tens. Add a regrouped hundred.

Alexandra has 87 emails in her inbox. She deletes 55 emails. How many emails are left in her inbox? Label the number line to show your thinking. + 10 + 10 + 10 + 2 87 Alexandra has emails left in her inbox.

Daniel has 307 pieces in a building set. He uses 139 pieces to build a house. How many pieces does he have left? Daniel has pieces left.

Luke solves this problem. He says that the difference is 119. 238 −129 Complete the explanation of the mistake Luke made. Luke regrouped 3 tens 8 ones as ten(s) 18 ones. He should have regrouped 3 tens 8 ones as ten(s) 18 ones. What is the correct difference? The correct difference is .

Sunnyday Elementary School is having its annual Read-a-thon. The third graders have read 486 books so far. Their goal is to read more than 800 books. What is the least number of books they need to read to reach their goal? They need to read at least more books.

There are 309 fiction books in the class library. The number of nonfiction books is 37 less than the number of fiction books. About how many nonfiction books are there in the class library? Round to the nearest ten. There are about nonfiction books in the class library. How many fiction and nonfiction books are there in the class library altogether? There are fiction and nonfiction books altogether.

Alia used 82 + 32 = 114 to check her subtraction. Which math problems could she be checking? Select all that apply.

Alex and Erika collected shells. The tables show the kinds of shells they collected. Alex's Shells Shell Number of Shells Scallop38 Jingle96 Clam113 Erika's Shells Shell Number of Shells Scallop79 Clam105 Whelk24 Who collected more shells? collected more shells. How many did she collect? She collected shells. About how many more is that? Round to the nearest ten. She collected about more shells. Alex and Erika have the greatest number of what kind of shell? They collected the greatest number of the kind of shell. How many shells of this kind did they collect? They collected shells of this kind.