Estimating and Adding Whole Numbers

The video tutorial explains how to break apart addition problems using estimation and place value. It demonstrates adding numbers by estimating sums and then calculating the exact total by adding hundreds, tens, and ones separately. The example of Margo counting manatees is used to illustrate the process, showing that 243 plus 179 equals 422, which is close to the estimated sum of 400. This method helps verify the reasonableness of the calculated sum.

What is the first step in breaking apart addition problems?

• Multiply the numbers

• Estimate the numbers

• Add the numbers directly

• Subtract the numbers

How can you simplify the number 243 for estimation?

• 240

• 200

• 250

• 300

What is the estimated sum of 243 and 179?

• 500

• 600

• 400

• 300

What is the purpose of estimating numbers before adding?

• To make the numbers larger

• To make the numbers smaller

• To simplify the addition process

• To complicate the addition process

When adding by place value, which place do you start with?

• Hundreds

• Thousands

• Ones

• Tens

What is the sum of the hundreds place in 243 and 179?

• 400

• 200

• 100

• 300

What is the first step in solving an addition problem using place value?

• Estimate the numbers

• Add the ones

• Add the tens

• Add the hundreds

What are the partial sums when adding 243 and 179?

• 200, 110, 12

• 300, 110, 12

• 200, 100, 22

• 300, 100, 22

What is the final sum of 243 and 179?

• 442

• 432

• 422

• 400

What is the sum of the tens place in 243 and 179?

• 10

• 20

• 30

• 40