Adding Whole Numbers Lesson 4-3 CCSS 4.NBT.4 Literature Link: Safari Park by Stuart Murphy Lesson 4-3 CCSS 4.NBT.4

MATH Essential Questions How do I know which computational method (mental math, estimation, paper and pencil, and calculator) to use? MATH Essential Questions

MATH Essential Questions How do mathematical operations relate to each other? MATH Essential Questions

MATH Essential Questions Why do I need mathematical operations? MATH Essential Questions

Warm Up Complete the patterns. 2, 5, 8, ___, ___, ___ 14, 21, 28, ___, ___, ___ ___, ___, ___

Today’s Lesson In today’s lesson, you will add numbers to the hundreds and thousands place, with and without regrouping.

Think and Write Tell about a time in your everyday life where you had to add two or more numbers together. Examples: In the store, calculating lunch money, adding allowance

Adding Numbers Add 234 + 247. Step 1: Add the ones. Regroup the ones if needed. Step 2: Add the tens, regrouping if needed. Step 3: Add the hundreds. Model this on the board step by step, or have students do it on slates/communicator boards.

Adding More than 2 Numbers You can always add three numbers using the old-fashioned addition method. Start with the ones, then the tens, hundreds, and so on. Regroup if necessary. 2,752 3,114 + 6,367 umbers using the old-fashioned addition method. 752 114 +367

Practice using the White Boards 4,574 + 1,398 5,632 + 8,699 15,879 + 43,884 324,786 + 945,785 659,544 + 977,857 Practice using the White Boards

Problem 1 During a dive to the Great Barrier Reef, divers saw 178 clownfish, 344 sea stars, and 569 seahorses. How many sea creatures did they see in all?

Problem 2 On the coral reef, scientists counted 2,577 male seahorses and 2,489 female seahorses. How many seahorses were on the reef altogether?

Problem 3 Scientists counted 4,777 five-legged starfish and 3,946 six-legged starfish on the reef. How many starfish did they count in all?

Problem 4 There were 3,467 crabs counted on Wednesday, 3,894 on Thursday, and 3,785 crabs counted on Friday. How many total crabs were counted on all three days?

Time For a Game Place Value Detectives packet if not complete Game – Addition Bingo Computer – http://www.internet4classrooms.com/skill_builders/addition_math_fourth_4th_grade.htm

Lesson Wrap Up In this lesson, you learned to add numbers up to five digits with regrouping. Homework – 4-3 Practice or 4-3 Enrichment