Multiply by 2-Digit Multipliers
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1 SS NS.G5.NB.5 stimate, Fluently round, multiply and manipulate multi-digit whole very numbers large (e.g., using millions) the standard and algorithm. very small (e.g., thousandths) numbers. UNDRLYNG SKLLS AND ONS: use basic multiplication facts; understand place value; multiply with -digit multipliers Multiply by 2-Digit Multipliers like breaking up things! When you multiply with 2-digit multipliers, you use basic facts, place value, and expanded notation. Multiplication lets you break up the problem into simpler parts. You can multiply the parts, then add to find the total. x a m p x a m p l l Find Remember: So, (5 30) First, do 68 5: Next, do 68 30: ,040 Last, add: 2,380 2 housands 2, 2, Hundreds ens Ones 2 2 (for 30) 3 4 (for 5) for 5 for 30 he school band is taking a trip to to the state band championship. band members are flying. ach ticket costs $24. How much will it cost for the airline tickets? Solve $24. Step Line up the place values. Hundreds ens Ones 24 Step 2 Multiply 24 by the ones of. Record product# Step 3 Multiply 24 by the tens of. Record product#2 Step 4 Add the partial products ,778 product# product#2 page 32 hapter 3 Lesson 4 SL Associates, nc. All rights reserved.
2 R A Show your work , , , , , , , , , ,9 SL Associates, nc. All rights reserved. 3. he school cafeteria bought 6 egg cartons. ach contains 8 eggs. How many eggs did the cafeteria buy? eggs 4. he airport parking lot has 2 rows. ach row has space for 47 cars cars 5. How many sodas are there in 7 cases, 6. How many hours are there in a 365-day year? A 24 hours B 389 hours 8,660 hours 7. What is the largest product possible if you multiply two 2-digit numbers? 9,80 xplain how you decided. ossible Answer: multiplied the largest 2-digit number, 99, by itself: , sodas D 8,760 hours hapter 3 Lesson 4 page 33
3 R A at home! Show your work , , , , , , , , , , he school cafeteria bought 22 egg cartons. ach contains 8 eggs. How many eggs did the cafeteria buy? eggs 4. he airport parking lot has 5 rows. ach row has space for 52 cars cars 5. How many sodas are there in 9 cases, 6. How many hours are there in a 80 days? A 24 hours B 204 hours 7. What is the smallest product possible if you multiply two 2-digit numbers? xplain how you decided sodas 4,320 hours D 4,420 hours 0 is the smallest 2-digit number so multiplying it by itself gives the smallest product. SL Associates, nc. All rights reserved. page 24 Home Resource and Homework hapter 3 Lesson 4
4 R A Show your work ,760, , , , ,692 5,040 6, , , , , , , ,9 SL Associates, nc. All rights reserved. 3. he school cafeteria bought 6 egg cartons. ach contains 8 eggs. How many eggs did the cafeteria buy? eggs 4. he airport parking lot has 2 rows. ach row has space for 47 cars cars 5. How many sodas are there in 7 cases, 6. How many hours are there in a 365-day year? A 24 hours B 389 hours 8,660 hours 7. What is the largest product possible if you multiply two 2-digit numbers? 9,80 xplain how you decided. ossible Answer: multiplied the largest 2-digit number, 99, by itself: , sodas D 8,760 hours hapter 3 Lesson 4 Student Book age page 33
5 R A at home! Show your work , , , , ,62 9,960, , , , , , , , he school cafeteria bought 22 egg cartons. ach contains 8 eggs. How many eggs did the cafeteria buy? eggs 4. he airport parking lot has 5 rows. ach row has space for 52 cars cars 5. How many sodas are there in 9 cases, 6. How many hours are there in a 80 days? A 24 hours B 204 hours 7. What is the smallest product possible if you multiply two 2-digit numbers? xplain how you decided sodas 4,320 hours D 4,420 hours 0 is the smallest 2-digit number so multiplying it by itself gives the smallest product. SL Associates, nc. All rights reserved. page 24 Home Resource and Homework hapter 3 Lesson 4
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