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"Multiplication without 0 in the middle or at the end of the factors" Multiplying three-digit numbers with two-digit numbers PPT courseware
Part One: Learning Objectives
1. Master the written calculation method of multiplying three-digit numbers by two-digit numbers without 0 in the middle or at the end of the factors.
2. Be able to estimate and calculate three-digit numbers by two-digit numbers, and be able to solve simple practical problems.
[Key Points] Understand the arithmetic of multiplying three-digit numbers by two-digit numbers and be able to calculate correctly.
[Difficulty] Write the result of multiplying the number in the tens place by a three-digit number in vertical format.
Multiplication PPT without 0 in the middle or at the end of the factors, part 2: analysis of examples
Compare, compete, and calculate each of the following questions orally.
13×30＝ 48×20＝
41×18≈ 57×11≈
22×19≈ 69×29≈
calculate
43×26＝ 12×34＝
Let’s talk about the written calculation method of multiplying two digits by one digit.
First, multiply the number in each digit of the second factor by the first factor. Use the number in which digit to multiply. The last digit of the multiplied product will be aligned with that digit. Then multiply the two times to get The products are added together.
Uncle Li took a train from a certain city to Beijing in 12 hours. The train traveled 145 kilometers per hour. How many kilometers is it from this city to Beijing?
(1) What information do you know from the question?
Answer: It took Uncle Li 12 hours to take a train from a certain city to Beijing. The train travels 145 kilometers per hour.
(2) What are the requirements to find out how many kilometers from this city to Beijing?
Answer: What is required is the distance from that city to Beijing.
Multiplication PPT without 0 in the middle or at the end of the factors, Part 3: Classroom exercises
1.Select
(1) In vertical calculation of 243×13, multiply 1 to the tens place by 243 to get ( ).
A 243 B 2430 C 729
(2) The product of 196×39 is ( ) digits.
A three digits B four digits C five digits
2. Do it
3. Calculation
4. Name the errors in the following calculations and correct them.
Multiplication PPT without 0 in the middle or at the end of the factors, Part 4: Summary after class
Classmates, what knowledge have you learned in this class?
A written calculation method for multiplying a three-digit number by a two-digit number without 0 in the middle or at the end of the factors
1. First multiply the three-digit number by the number in the ones digit of the two-digit number, and align the last digit of the product with the ones digit of the two-digit number.
2. Use the two-digit tens digit to multiply the three-digit number, and align the last digit of the product with the tens digit of the two-digit number.
3. Then add the two multiplied numbers.
Keywords: Free download of PPT courseware for mathematics in the first volume of the fourth grade of the People's Education Press, download of multiplication PPT without 0 in the middle or at the end of factors, download of three-digit multiplication of two-digit PPT, .PPT format;
For more information about the PPT courseware "Multiplying three-digit numbers by two-digit factors without zeros in the middle or at the end", please click on the Multiplication PPT tag of three-digit numbers by two-digit factors without zeros in the middle or at the end.
"Multiplication without 0 in the middle or at the end of the factors" Multiplying three-digit numbers with two-digit numbers PPT:
"Multiplication without 0 in the middle or at the end of the factors" Three-digit times two-digit PPT Part One content: Lesson objectives 1. Experience the process of exploring the calculation method of three-digit times two-digit numbers, and master three-digit times two-digit numbers (factors no 0 in the middle or at the end). 2. Obtain known applications..