5 Minute Check Complete in your notebook. Find. 1. 4 + 4 + 4 + 4 2. 7 + 7 + 7 + 7 + 7 3. 6 + 6 + 6 4. 9 + 9 + 9 + 9 + 9 + 9
5 Minute Check Complete in your notebook. Find. 1. 4 + 4 + 4 + 4
5 Minute Check Complete in your notebook. Find. 1. 4 + 4 + 4 + 4 = 16 8 12 16
5 Minute Check Complete in your notebook. Find. 2. 7 + 7 + 7 + 7 + 7
5 Minute Check Complete in your notebook. Find. 2. 7 + 7 + 7 + 7 + 7 = 35 14 21 28 35
5 Minute Check Complete in your notebook. Find. 3. 6 + 6 + 6
5 Minute Check Complete in your notebook. Find. 3. 6 + 6 + 6 = 18 12 18
5 Minute Check Complete in your notebook. Find. 4. 9 + 9 + 9 + 9 + 9 + 9
5 Minute Check Complete in your notebook. Find. 4. 9 + 9 + 9 + 9 + 9 + 9 = 54 18 27 36 45 54
Review Lesson 1 Multiplication Friday, Aug 19 Review Lesson 1 Multiplication
Multiplication Objective: To understand how to multiply whole numbers.
Multiplication What is multiplication in math?
Multiplication What is multiplication in math? Multiplication is repeated addition.
Multiplication What is addition in math?
Multiplication What is addition in math? Addition is repeated counting.
Multiplication What is addition in math? Addition is repeated counting.
Multiplication If you were in kindergarten, how would you determine how many apples there are?
Multiplication If you were in kindergarten, how would you determine how many apples there are? You would probably count the apples. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Multiplication If you were in 2nd grade, how would you determine how many apples there are?
Multiplication If you were in 2nd grade, how would you determine how many apples there are? You would probably add the number of apples in each row. 5 + 5 = 15
Multiplication If you were in 4th grade, how would you determine how many apples there are?
Multiplication If you were in 4th grade, how would you determine how many apples there are? You would probably multiply the number of rows by the number of columns. 5 3 5 x 3 = 15
Multiplication Why would you pick one method over another?
Multiplication What is this?
Multiplication
Multiplication Multiples list for 1. 0,1, 2,3, 4, 5,6 7, 8, 9,10……. Can we spot any patterns?
Multiplication Multiples list for 2. 0,2 ,4 ,6 , 8 ,10 , 12 , 14, 16, 18, 20……. Can we spot any patterns?
Multiplication Multiples list for 3. 0 ,3 ,6 , 9 , 12 , 15, 18, 22, 24, 27, 30……. Can we spot any patterns?
Multiplication Multiples list for 4. 0 ,4, 8, 12, 16, 20, 24, 28, 32, 36, 40……. Can we spot any patterns?
Multiplication Multiples list for 5. 0 ,5, 10, 15, 20, 25, 30, 35, 40, 45, 50……. Can we spot any patterns?
Multiplication Multiples list for 6. 0 ,6, 12, 18, 24, 30, 36, 42, 48, 54, 60……. Can we spot any patterns?
Multiplication Multiples list for 7. 0 ,7, 14, 21, 28, 35, 42, 49, 56, 63, 70……. Can we spot any patterns?
Multiplication Multiples list for 8. 0 ,8, 16, 24, 32, 40, 48, 56, 64, 72, 80……. Can we spot any patterns?
Multiplication Multiples list for 9. 0 ,9, 18, 27, 36, 45, 54, 63, 72, 81, 90……. Can we spot any patterns?
Multiplication Multiples list for 10. 0 ,10,20,30,40,50,60,70,80,90,100……. Can we spot any patterns?
Multiplication What is this?
Multiplication 5 x 1,000,000 5 4 7 3 2 8 1
Multiplication 5 x 1,000,000 + 4 x 100,000 5 4 7 3 2 8 1
Multiplication 5 x 1,000,000 + 4 x 100,000 + 7 x 10,000 5 4 7 3 2 8 1
Multiplication 5 x 1,000,000 + 4 x 100,000 + 7 x 10,000 + 3 x 1,000 5 4 7 3 2 8 1
Multiplication 5 x 1,000,000 + 4 x 100,000 + 7 x 10,000 + 3 x 1,000 + 2 x 100 5 4 7 3 2 8 1
Multiplication 5 x 1,000,000 + 4 x 100,000 + 7 x 10,000 + 3 x 1,000 + 2 x 100 + 8 x 10 5 4 7 3 2 8 1
Multiplication 5 x 1,000,000 + 4 x 100,000 + 7 x 10,000 + 3 x 1,000 + 2 x 100 + 8 x 10 + 3 x 1 5 4 7 3 2 8 3
32 x 4 Multiplication Let’s look at a simple multiplication problem. What do we do first?
Multiplication Let’s look at a simple multiplication problem. 32 x 4 8
32 x 4 8 Multiplication Let’s look at a simple multiplication problem. What is next?
Multiplication Let’s look at a simple multiplication problem. 32 x 4 128 How does this work?
Multiplication Let’s look at a simple multiplication problem. 32 x 4 128 Is the same as: 2 x 4 + 30 x 4 8 + 120
32 x14 Multiplication Let’s look at a simple multiplication problem. What do we do first?
Multiplication Let’s look at a simple multiplication problem. 32 x14 128 What do we do next?
Multiplication Let’s look at a simple multiplication problem. 32 x14 128 Why ?
Multiplication Let’s look at a simple multiplication problem. 32 x14 128 Why ? We are actually multiplying 10 x 32 and anytime you multiply by 10, it ends in a zero.
Multiplication Let’s look at a simple multiplication problem. 32 x14 128 What do we do next?
Multiplication Let’s look at a simple multiplication problem. 32 x14 128 320 What do we do next?
Multiplication Let’s look at a simple multiplication problem. 32 x14 128 +320 448 What does this work?
Multiplication Let’s look at a simple multiplication problem. 32 x14 128 +320 448 What does this work? 2 x 4 + 4 x 30 +10 x 2 +10 x 30 8 + 120 + 20 + 300
Multiplication Do this on your own. 23 x12
23 x12 46 +230 Multiplication Do this on your own. 276 Check: 2 x 3 + 2 x 20 +10 x 3 +10 x 20 6 + 40 + 30 + 200
Multiplication Do this on your own. 45 x17
45 x17 315 +450 Multiplication Do this on your own. 3 765 Check: 7 x 5 + 7 x 40 +10 x 5 +10 x 40 35 + 280 + 50 + 400
Multiplication Do this on your own. 63 x25
63 x25 315 +1260 Multiplication Do this on your own. 1 1575 Check: 5 x 3 + 5 x 60 +20 x 3 +20 x 60 15 + 300 + 60 + 1200
Multiplication Another way of multiplying 2 two digit numbers. 23 x 12 =
Multiplication Another way of multiplying 2 two digit numbers. 23 x 12 = Step 1 – Multiply the first digits in each number.
Multiplication Another way of multiplying 2 two digit numbers. 23 x 12 = 2 Step 1 – Multiply the first digits in each number.
Multiplication Another way of multiplying 2 two digit numbers. 23 x 12 = 2 Step 2 – Leave a blank spot for one digit.
Multiplication Another way of multiplying 2 two digit numbers. 23 x 12 = 2_ Step 2 – Leave a blank spot for one digit.
Multiplication Another way of multiplying 2 two digit numbers. 23 x 12 = 2_ Step 3 – Multiply the last digits in each number.
Multiplication Another way of multiplying 2 two digit numbers. 23 x 12 = 2_6 Step 3 – Multiply the last digits in each number.
Multiplication Another way of multiplying 2 two digit numbers. 23 x 12 = 2_6 Step 4 – Add the product of the outer numbers and the product of the inner numbers and place in the blank spot.
Multiplication Another way of multiplying 2 two digit numbers. 23 x 12 = 2_6 4 Step 4 – Add the product of the outer numbers and the product of the inner numbers and place in the blank spot.
Multiplication Another way of multiplying 2 two digit numbers. 23 x 12 = 276 4+ 3 = 7 Step 4 – Add the product of the outer numbers and the product of the inner numbers and place in the blank spot.
Multiplication Another way of multiplying 2 two digit numbers. 32 x14
Multiplication Another way of multiplying 2 two digit numbers. 32 x14 = 3
Multiplication Another way of multiplying 2 two digit numbers. 32 x14 = 3_
Multiplication Another way of multiplying 2 two digit numbers. 32 x14 = 3_8
Multiplication Another way of multiplying 2 two digit numbers. 32 x14 = 3_8 12 + 2 = 14
Multiplication Another way of multiplying 2 two digit numbers. +1 32 x14 = 348 = 448 12 + 2 = 14
32 x14 = 348 = 448 12 + 2 = 14 Why does this work? Multiplication Another way of multiplying 2 two digit numbers. +1 32 x14 = 348 = 448 12 + 2 = 14 Why does this work?
Multiplication Another way is the Chinese method of multiplying numbers. 23 x 12
Multiplication Another way is the Chinese method of multiplying numbers. 23 x 12
Multiplication Another way is the Chinese method of multiplying numbers. 23 x 12
Multiplication Another way is the Chinese method of multiplying numbers. 23 x 12
Multiplication Another way is the Chinese method of multiplying numbers. 23 x 12
Multiplication Another way is the Chinese method of multiplying numbers. 23 x 12
Multiplication Another way is the Chinese method of multiplying numbers. 23 x 12 6
Multiplication Another way is the Chinese method of multiplying numbers. 23 x 12 6
Multiplication Another way is the Chinese method of multiplying numbers. 23 x 12 7 6
Multiplication Another way is the Chinese method of multiplying numbers. 23 x 12 7 6
Multiplication Another way is the Chinese method of multiplying numbers. 23 x 12 = 2 7 6
23 x 12 = 2 7 6 Why does this work? Multiplication Another way is the Chinese method of multiplying numbers. 23 x 12 = 2 7 6 Why does this work?
Multiplication Multiply. 17 x 11
Multiplication Multiply. 17 x 11 17 x11 +170 187
Multiplication Multiply. 26 x 12
Multiplication Multiply. 26 x 12 1 26 x12 52 +260 312
Multiplication Multiply. 57 x 25
Multiplication Multiply. 57 x 25 57 x25 285 +1140 1425
Multiplication Multiply. 45 x 11
Multiplication Multiply. 45 x 11 45 x11 +450 495
Multiplication 11 Multiples List 11 x 11 = 121 21 x 11 = 231 12 x 11 = 132 22 x 22 = 242 13 x 11 = 143 14 x 11 = 154 15 x 11 = 165 16 x 11 = 176 17 x 11 = 187 18 x 11 = 198 19 x 11 = 209 20 x 11 = 220 Can you make a short cut to multiply numbers by 11?
Multiplication 45 x 11 To multiply a number by 11, the product’s first digit will be the first digit of the number you multiply by 11. 4
Multiplication 45 x 11 To multiply a number by 11, the product’s last digit will be the last digit of the number you multiply by 11. 4_5
Multiplication 45 x 11 To multiply a number by 11, the product’s middle digit will be the sum of the digits you multiply by 11. 495
Multiplication 53 x 11 The first digit?
Multiplication 53 x 11 The last digit? 5
Multiplication 53 x 11 The middle digit? 5_3
Multiplication 53 x 11 583
Multiplication 49 x 11 The first digit?
Multiplication 49 x 11 The last digit? 4
Multiplication 49 x 11 The middle digit? 4_9
Multiplication 49 x 11 The middle digit? 539
Multiplication 65 x 11
Multiplication 65 x 11 715
Multiplication This short cut also works with numbers large than two digits. The first digit? 423 x 11
Multiplication This short cut also works with numbers large than two digits. The last digit? 423 x 11 4_3
Multiplication This short cut also works with numbers large than two digits. The first middle digit? 423 x 11 4_3
Multiplication This short cut also works with numbers large than two digits. The second middle digit? 423 x 11 46_3
Multiplication This short cut also works with numbers large than two digits. The second middle digit? 423 x 11 4653
Multiplication This short cut also works with numbers large than two digits. 423 x 11 4653
Multiplication 526 x 11
Multiplication 526 x 11 5786
Multiplication Agenda Notes Skills Practice R.1 Due by the end of class. Show all work and circle all answers!