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People's Education Press First Grade Mathematics Volume 2
Qingdao Edition Seventh Grade Mathematics Volume 2
Category | Format | Size |
---|---|---|
Hebei Education Edition First Grade Mathematics Volume 2 | pptx | 6 MB |
Description
"Adding and subtracting whole tens with two digits" PPT
Part One: Classroom Training
(1) Calculate, how many apples did the kindergarten buy in total?
30+20=50 (pieces)
Add 3 tens to 2 tens to get 5 tens, which is 50.
(2) If 20 apples are given to the small class, how many apples are left?
50-20= 30 (pieces)
Subtract 2 tens from 5 tens to get 3 tens, which is 30.
Two-digit addition and subtraction of whole tens PPT, part 2 content: classroom operations
1. Look at the diagram.
Looking at the picture, you can list addition equations or subtraction equations.
40+20=
60-20=
60-40=
2. Do the math.
3+2= 4+5=
30+20= 40+50=
6-4= 7-3=
60-40= 70-30=
Two-digit addition and subtraction of whole tens PPT, the third part of the content: place the stick and write the calculation formula.
First place 8 bundles and 8 small sticks, and then take away 7 bundles of small sticks.
First place 8 bundles and 8 small sticks, and then take away 7 small sticks.
Think about it: What is the difference between the numbers represented by the sticks taken away twice?
Answer: The number of the sticks taken away twice is a double digit and a single digit.
Keywords: Free download of mathematics PPT courseware for the second volume of the first grade of Hebei Education Edition, two-digit addition and subtraction of integers PPT download, .PPT format;
For more information about the PPT courseware "Addition and subtraction within 100, two-digit addition and subtraction of whole tens", please click the Addition and subtraction within 100 ppt two-digit addition and subtraction of whole tens ppt tag.
File Info
Update Time: 2024-10-19
This template belongs to Mathematics courseware Hebei Education Edition First Grade Mathematics Volume 2 industry PPT template
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