Unit 4

Add using the break apart method:

193 + 345 =

Tags

CCSS.2.NBT.B.7

Add the sum using the break apart method

214 + 532 =

Tags

CCSS.2.NBT.B.7

Estimate the sum

642 + 227 =

• 800

• 700

• 900

• 600

Estimate. Then use the break apart strategy to find the sum. 271 + 438 =

• Estimate: 300 + 400 = 700; Actual sum: 709

• Estimate: 200 + 400 = 600; Actual sum: 708

• Estimate: 250 + 450 = 700; Actual sum: 719

• Estimate: 270 + 430 = 700; Actual sum: 701

Add to find the sum.

366 + 415 =

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Estimate. Then use the break apart strategy to find the sum. 286 + 274 =

• Estimate: 300 + 300 = 600; Actual sum: 560

• Estimate: 200 + 200 = 400; Actual sum: 470

• Estimate: 250 + 250 = 500; Actual sum: 540

• Estimate: 280 + 270 = 550; Actual sum: 555

There are two baby giraffes at the zoo. One weighs 148 pounds and the other weighs 137 pounds. Which is their combined weight?

• A. 295 pounds

• B. 275 pounds

• C. 285 pounds

• D. 278 pounds

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

One day, Elmo the elephant ate 128 pounds of food. Ella the elephant ate 115 pounds of food. Together, how many pounds of food did the elephants eat that day?

• 244 pounds

• 233 pounds

• 253 pounds

• 243 pounds

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

There are 176 snakes and 236 birds living at the zoo. How many birds and snakes are there?

• A. 422

• B. 412

• C. 402

• D. 302

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

A zoo rescued 252 animals last year and 328 animals this year. How many animals were rescued in these two years?

• 590

• 580

• 570

• 680

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2