Adding 3 Digit Numbers with Base Tens

Once the numbers are in expanded form, now what do we do?

• Start in the hundreds place and add the two numbers in the hundreds place.

  Add 8 + 1.

• Start in the tens place and add the two numbers in the tens place. Add 3 + 2.

• Start from the ones place and add the two numbers in the ones place.

  Add 2 + 3.

What is the sum of their base ten blocks?

• 233

• 121

• 345

• 145

5 hundreds, 8 tens, and 6 ones Plus 4 hundreds, 1 ten, and 3 ones will give?

382 + 611 = What two hundreds are we adding?

• 300 + 600

• 800 + 100

• 200 + 300

• 41

• 51

• 61

• 71

Write the value of base-ten blocks

• 3 hundreds, 3 tens, 1 one.

• 2 hundreds, 3 tens, 0 ones.

• 200 hundreds, 30 tens, 0 ones.

• 0 hundreds, 2 tens, 3 ones.

• 223

• 123

• 334

• 100

• 231

• 331

• 142

• 100

• 200

• 153

• 326

• 316