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People's Education Press Third Grade Mathematics Volume 1
People's Education Press Second Grade Mathematics Volume 1
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Beijing Normal University Edition Eighth Grade Mathematics Volume 1
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Qingdao Edition Seventh Grade Mathematics Volume 2
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People's Education Press First Grade Mathematics Volume 2
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Category | Format | Size |
---|---|---|
Qingdao Edition Fourth Grade Mathematics Volume 1 | pptx | 6 MB |
Description
"Protecting Swans" PPT courseware 9
What patterns did you discover through the observations just now?
If one factor remains unchanged and the other factor is expanded to the original multiple, the product will also be expanded to the original multiple.
practice
1.6 What is the expansion of 10 times? 6×10=60
How much is 2.35 reduced by 5 times? 35÷5=7
3.6 What is the expansion of 100 times? 6×100=600
4.What is 100 reduced by 4 times? 100÷4=25
If one factor remains unchanged and the other factor shrinks to its original size, the product will also shrink to its original size.
Do it:
Find the product of the first question in each set of questions, and then quickly write the product of the following two questions.
12×3= 48×5= 24×5=
120×3= 48×50= 24×25=
1200×3= 48×500= 24×75=
Do it:
Calculate the product of each of the following questions and explain how you calculated it.
5×14= 24×2= 8×7=
50×14= 24×4= 8×70=
500×14= 24×8= 8×700=
Expand the length of this rectangular park to three times its original size without changing the width.
What will be the size of the park after the expansion?
Answer: The area of the park after expansion is 36 hectares.
Summary
After studying this lesson, students must master the law of change of product and be able to apply this law to solve practical problems.
Keywords: Protect the swan teaching courseware, Qingdao edition fourth grade mathematics volume PPT courseware download, fourth grade mathematics slide courseware download, Protect the swan PPT courseware download, .PPT format;
For more information about the "Protect the Swans" PPT courseware, please click the "Protect the Swans" ppt tab.
"Protecting Swans" PPT courseware 10:
"Protect the Swan" PPT Courseware 10 Oral Calculation 62 = 204 = 620 = 104 = 6200 = 54 = 1.6 What is the expansion to 10 times of the original size? 610=60 What would it be if 2.6 were expanded to 100 times its original size? 6100=600 Summary: Multiplying a number can also be said to multiply this number...
"Protecting Swans" PPT courseware 8:
"Protecting Swans" PPT courseware 8 Happy eating fruit. 352=70 1407=980 2803=840 2304=920 136=78 1406=840 183=54 2503=750 175=85 Explore new knowledge ① Oral calculation: Student: First use 1063=318 and then add a 0 at the end of the product. ②Written calculation...
"Protecting Swans" PPT courseware 7:
"Protect the Swan" PPT Courseware 7 Teaching Objectives In this lesson, we will mainly learn the written calculation of three-digit times two-digit numbers. Students must master the method of vertical calculation and be able to calculate the vertical calculation of three-digit times two-digit numbers. calculation problems and can solve related application problems. you..
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Update Time: 2024-09-06
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