Adding with an Expanded Algorithm
Models for Adding 3 Digit Numbers
Adding 3 Digit Numbers
Subtracting 3 Digit Numbers
Drawing a Picture and Writing a Number Sentence
100
Break the problem into smaller parts AND solve! 550 + 423
973
100
Open your book to page 69. Answer problem 6!
279 + 143 = 422
100
ESTIMATE and then find the sum! 274 + 293
560 OR 600
100
Subtract! 341 - 260
81
100
Draw a picture and answer the problem! A total of 275 people entered a bicycle race. So far 130 people have finished the race. How many people are still racing?
275 people in all 130 _______ 275 people in all 130 + 145
200
Break the problem into smaller parts AND solve! 546 + 232
778
200
Open your book to page 69. Answer problem 7!
202 + 318 = 520
200
Find the sum! 737 + 194
931
200
Subtract! 416 - 305
111
200
The height of Capote Falls is 175 feet. The height of Madrid Falls is 120 feet. Write and solve a number sentence to find how much taller Capote Falls is than Madrid Falls.
175 - 120 = 55
300
Break the problem into smaller parts AND solve! 288 + 103
391
300
Find each sum. Draw a picture to help you! 399 + 234
633
300
Find each sum! 307 + 37 + 234
578
300
Subtract! 327 - 238
89
300
Open your book to page 90 Answer problem number 5!
29 Representatives in all 15 + 14
400
There are 401 people watching a soccer game at a stadium. Then, 295 more people arrive. How many people are at the soccer game now?
696 people
400
Find each sum. Draw a picture to help you! 526 + 307
833
400
Find each sum! 303 + 128 + 63 + 149
643
400
Subtract! 820 - 167
653
400
Mr. Barnes has $477 in the bank. He takes out $200 to buy a carton of Smencils that costs $180. Write a number sentence to show how much money he has left in the bank.
$477 - $200 = $277
500
Bill needs to find 318 + 230. Into what three smaller problems can he break this addition?
300 + 200 10 + 30 8 + 0
500
Mr. Barnes drove 334 miles yesterday. He drove 225 miles today. Draw pictures to find how many miles he drove in all.
559 miles
500
Find each sum! 127 + 39 + 122 + 433
721
500
Ms. Hunt needs 602 beads for an art project. A large bag has 303 beads. A small bag of beads has 195 beads. Will one large bag and one small bag be enough? Explain!
No! 303 + 195 = 498 602 - 498 = 104 beads missing!
500
Ms. Hunt bought 225 drinks for a picnic. She bought 125 cartons of milk, 88 bottles of water and some bottles of juice. Write a number sentence that shows how many bottles of juice she bought.
225 - 125 - 88 = 12 bottles of juice
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