Addition and Subtraction Strategies within 1,000

What is the main goal when learning addition and subtraction within 1000?

• To use concrete models or drawings effectively

• To focus solely on the written method without understanding it

• To memorize all possible addition and subtraction facts

• To avoid using any strategies based on place value

Why is it sometimes necessary to decompose tens or hundreds in addition and subtraction?

• To make the numbers easier to handle

• None of the above

• To avoid using place value strategies

• Because it's a mandatory rule

In the base-ten addition strategy, what do you do when you have more than 9 ones?

• Compose a ten from these ones

• Start counting from one again

• Ignore the extra ones

• Leave them in the ones place

What is the result of adding 334 and 228 using the base-ten strategy?

• 562

• 572

• 552

• 582

What is the purpose of using a place value chart in the base-ten strategy?

• To visually organize numbers by place value

• To make calculation slower

• To confuse the students

• To avoid drawing models

In the totals down strategy, what is the first step when adding numbers?

• Add the hundreds place

• Multiply the largest numbers

• Start with the ones place

• Combine the tens place first

What is the sum of 414 and 187 using the totals down strategy?

• 591

• 601

• 621

• 611

When subtracting without needing to regroup, what is the difference between 664 and 221?

• 473

• 463

• 453

• 443

In subtraction, what do you do if you don't have enough tens to subtract?

• Borrow from the ones

• Decompose a hundred into tens

• Start over with the problem

• Ignore the subtraction

What is the difference between 824 and 352 using base-ten blocks and regrouping?

• 462

• 492

• 472

• 482