2. UNIT 5 REVIEW Everyday Math Grade 4 BES

3. Get your whiteboard ready! We’ll go lesson by lesson to review the concepts you learned throughout the unit. Ready, set… Thinking cap on? Go!!!

4. Lesson 5.1-X Fact Extensions 80 x 40 = 3,200 30 x 700 = 21,000 50 x _____ = 250 5 _____ x 90 = 54,000 600 Skill: Extend basic facts to products of ones and tens and products of tens and tens Strategy: Ignore the zeros, multiply the remaining basic factors, count up the zeros and add them onto your product

5. Lesson 5.2- Multiplication Wrestling Purpose: to provide practice with extended multiplication facts and to introduce the principles of multi-digit multiplication Let’s move right along!

6. Lesson 5.3-Estimating Sums 868 + 423 = 900 + 400 = 1,300 591 + 632 + 372 = 600 + 600 + 400 1,600 287 + 1,793 + 2,552 = 300 + 2,000 + 3,000 5,300 17,922 + 4,008 + 5,827 = 18,000 + 4,000 + 6,000 28,000 Purpose: to provide practice estimating sums Strategy: the larger the place value you round to, the easier it is to estimate in your head So remember, keep it simple!

7. Lesson 5.4- Estimating Products Purpose: to practice estimating whether a product is in the tens, hundreds, thousands, or more Strategy: similar to addition, once numbers are rounded, multiply (ignore the zeros, then add them to the product) 49 x 22 = 50 x 20 = 1,000(thousands) 97 x 73 = 100 x 70 7,000(thousands) 190 x 68 = 200 x 70 14,000(ten-thousands) 4,847 x 411 = 5,000 x 400 = 2,000,000 (millions)

8. Lesson 5.5 and 5.6- Partial-Products and Traditional Purpose: to review and practice the partial- products algorithm and the traditional method Remember: pay close attention to place values (values of digits) Let’s practice! 73 x 9 = 657 45 x 81 = 3,645

9. Lesson 5.8-BIG Numbers Part I: Reading 356,092 92,837,006 3,872,093,576 Part II: Writing Listen carefully as your teacher reads aloud some BIG numbers. Record them on your whiteboard.

10. Lesson 5.9-Powers of 10 Purpose: to introduce exponential notation for powers of 10 Exponents help us name the values of places in our base-ten system. Let’s review! (No whiteboards needed.) 1 = 10 0 Let’s build on that piece of information! 10 = 10 1 = 10 100 = 10 2 = 10 x 10 1,000 = 10 3 = 10 x 10 x10 10,000 = 10 4 10 x 10 x 10 x 10 100,000 = 10 5 10 x 10 x 10 x 10 x 10 1,000,000 = 10 6 10x10x10x10x10x10

11. Lesson 5.10- Rounding LARGE Numbers Purpose: to discuss sensible ways to report large numbers and to review rounding a number to a certain place value Strategy: underline the given place value, look to place value to the right, 0-4 stay, 5-9 round up Let’s practice! Round to the nearest thousand 18,219 18,000 Round to the nearest hundred-thousand 3,478,398 3,500,000 Round to the nearest million 673,908,004 674,000,000

12. Lesson 5.11-Comparing Data Purpose: to look up and compare numerical data Strategy: line up the place values in each number, starting on the left look for the larger digit Let’s practice! Get into groups of three. Two of you need to need to write numbers in the hundred-thousands. The third person needs to write, or = to complete each sentence. Finally, turn and face the teacher to have your work checked. Round 2: ten-millions Round 3: billions

13. Lesson 5.12- Checking Progress Purpose: to assess your progress on math content through the end of Unit 5. That means, other skills, such as measuring and computation involving decimals, will be tested as well. Good luck!