Reveal Math Unit 9 Review

Addie adds 236 + 122 by place value. She decomposes the addends as

200 + 3 + 6 and 100 + 2 + 2.

Addie says the sum is 358.

Is she correct?

• yes

• no

What is the sum?? Decompose 1 addend to solve.

Which shows your work and the correct answer?

521 + 235=

• 521 + 2 + 3 + 5= 531

• 500 + 20+ 1 + 235= 756

• 521 + 200 + 3 + 5= 729

• 500+ 20 + 1 + 200 + 30 + 5= 756

Match the following

addition problems to show adjusting to add.

• 140 + 241 = 381

• 333 + 288=

• 331 + 290=621

• 535 + 167=

• 232 + 150=382

• 148 + 234=

• 532 + 170 = 712

• 137 + 244=

Tanner sells football and baseball cards.

He has 258 football cards and 164 baseball cards.

What is the total number of cards he has for sale?

• 322

• 312

• 422

• 412

Is the statement true or false?

The total number of tens in the sum of 226 + 751 is 9.

• TRUE

• FALSE

Which strategy is shown?

235 + 433 =

200 + 30 + 5 + 433 = 668

• decomposing 1 addend

• adjusting

• decomposing both addends

Do you need to regroup?

212 + 541 =

• yes

• no

Bird watchers count 531 pelicans and 100 eagles at the lake.

How many pelicans and eagles do they count?

• 532

• 541

• 641

• 631

What strategy is shown?

436 + 238 =

+ 4 - 4

440 + 234 = 674

• skip counting

• adjusting

• decomposing

Is the statement true or false?

The total number of tens in the sum of 125 + 352 is 7.

• TRUE

• FALSE