5. multiplying 2 to 4 digit numbers by 1-to 2-digit
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1) The document provides instructions and examples for multiplying 2-4 digit numbers by 1-2 digit numbers without regrouping. It includes step-by-step worked examples and exercises. 2) Students are asked to solve word problems that require multiplying numbers with 2-4 digits by 1-2 digits to find totals, lengths, or amounts spent. 3) The assignment asks students to solve 5 word problems that require multiplying given amounts, lengths, or prices to determine totals, lengths, or amounts spent.
5. multiplying 2 to 4 digit numbers by 1-to 2-digit
- 1. MULTIPLYING 2- TO 4 DIGIT NUMBERS BY 1-TO 2-DIGIT NUMBERS WITHOUT REGROUPING
- 2. Basic multiplication facts 8 x 1 3 x 7 4 x 0 9 x 2 5 x 6 10 x 4
- 3. MESSAGE IN BOXES MULTIPLY. WRITE THE LETTER THAT IS NEXT TO EACH ANSWER IN THE CORRECT BOX BELOW. READ THE SECRET MESSAGE. 9 4 3 9 5 x 2 x 9 x 4 x 7 x 2 9 5 9 9 6 x 8 x 9 x 9 x 3 x 9 A E H O R WUTS Y
- 4. 27 63 27 W O W 45 12 18 45 T H A T 72 81 10 36 S U R E 27 18 72 W A S 36 18 72 54 E A S Y
- 5. Andres Bonifacio Elementary School received 12 boxes of toy from the governor of the province. Each box had 24 assorted toy. How many toys were there in all?
- 6. Understand the problem • What is asked in the problem? Number of toys in all. • What are given? 12 boxes of toys, 24 assorted toys • What process will you use? Multiplication. Plan 12 x 24 = N 24 = 20 + 4 x 12 = 10 + 2
- 7. CARRY OUT THE PLAN Step 1: 20 + 4 x 10 + 2 40 + 8 2 x 4 = 8 2 x 20 = 40 Step 2: 20 + 4 x 10 + 2 200 + 40 10 x 4 = 40 10 x 20 = 200 Step 3: 24 = 20 + 4 x 12 = 10 + 2 40 + 8 + 200 + 40 240 + 48 = 288 toy planes
- 8. ADD THE TWO PARTIAL PRODUCTS 24 X 12 48 PARTIAL PRODUCTS + 240 PRODUCT 288 Multiply by ones 24 x 12 48 240 Multiply tens 24 24 x 2 x10 48 240
- 9. 1) 22 x 11 3) 322 x 33 2) 322 x 3 4)1 243 x 12
- 10. GROUP ACTIVITY ( 4 GROUPS ) Group I = Group II = Group III = Group IV = 124 x 2 221 x 4 213 x 13 212 x 3 6321 x 12 32 412 x 12 4 213 x 12 2 134 x 12 21 x 21 13 x 12 14 x 2 23 x 13
- 11. Remember: In multiplying 2- to 4- digit numbers by 1- to 2- digit numbers without regrouping, start with the one, then the tens, then the hundreds, and lastly the thousands.
- 12. Pick a number from box X. Multiply it by a number from box Y. Write the numbers for X and Y that are equivalent to the given answers below. 42 22 123 23 31 431 21 12 32 24 33 20 Box X Box Y 1)483 X= Y= 4)504 X= Y= 2) 8620 X= Y= 5) 528 X= Y= 3) 3936 X= Y= 6) 1023 X= Y=
- 13. EXERCISE: Find the missing digits 1) 2 3 4 2 2 + 4 8 68 5 4 8 4) 3 2 x 1 2 2 3 8 4 5) 1 2 3 x 1 3 6 9 12 1 9 9 2) 4 3 2 1 x 2 3 1 2 9 8 42 9 9 8 3 3) 2 4 x 1 1 2 6 4
- 14. ASSIGNMENT: Solve the following problems: 1. Ellen has 23 pages of stamps. Each page has 112 pieces. How many stamps does she has in all? 2. Mang Mario needs 4 poles for his vegetable garden. Each pole should be 122 centimeters long. What will be the total length of 4 poles. 3. The bookstore received a shipment of 13 boxes of books. Each box contained 112 books. How many books were in the shipment?
- 15. 4) Puring and Linda are going home after visiting their grandmother. The trip takes 3 hour. If the bus travels 122 kilometers an hour, how far away is their house? 5) Edith bought 231 pieces of linen paper at P3 each. How much did she spend for the linen paper?