"Reading Room" Addition and Subtraction PPT (Lesson 1)

Description

"Reading Room" Addition and Subtraction PPT (Lesson 1)

Part 1: Create scenarios and stimulate interest

Classmates, let’s go to the reading room to read together today, okay?

This is a table compiled by the aunt in the reading room. What do you know from it?

What mathematical questions can you ask based on this mathematical information?

①How many children’s illustrated magazines are left?

②How many storybooks are left?

③How many comic books are left? …

Reading room PPT, part 2: independent learning, exploring arithmetic

1. How many children’s illustrated magazines are left?

30-7=23

10-7＝3

20＋3＝23

2. How many storybooks are left?

25-8=17

Counting from the ones digit, if the ones digit is not enough, borrow 1 from the tens digit.

The 2 on the tenth place borrowed the 1 and left 1

Borrow 1 to make ten, add 5 to 10 to get 15; subtract 8 from 15 to get 7, the total is 17.

Reading room PPT, Part 3: Consolidation exercises

1. Use a stick or calculator to do the math.

52-6 = 50-3 = 54-8 =

2. Think about it and do the math.

10－7＝　13－5＝　100－1＝

30-7＝ 23-5＝ 100-2＝

50-7＝ 33-5＝ 100-3＝

3． Use vertical calculation.

48-9= 53-6= 70-7= 32-3=

Reading room PPT, part 4: Class summary

What did you gain today? Combined with the calculation formula, let's talk about the calculation method of subtracting a two-digit number by subtracting a one-digit number.

Keywords: Free download of Beijing Normal University Edition first-year mathematics PPT courseware for volume 2, reading room PPT download, addition and subtraction PPT download, .PPT format;

For more information about the "Addition and Subtraction Reading Room" PPT courseware, please click the Addition and Subtraction PPT Reading Room PPT tab.

"Reading Room" Addition and Subtraction PPT download:

"Reading Room" Addition and Subtraction PPT Download Part One: Learning Objectives 1. Explore and master the calculation method of two-digit subtraction and one-digit subtraction, and further appreciate the diversity of calculation methods. 2. Cultivate students' hands-on operation ability and observation ability, and continue to develop...

"Reading Room" Addition and Subtraction PPT (Lesson 2):

"Reading Room" Addition and Subtraction PPT (Lesson 2) Part 1: Review and introduction of oral arithmetic. 50-9＝ 22-4＝ 78-50＝ 76-7＝ 61-6＝ 9＋45＝ 86-8＝ 36＋5＝ 38＋27＝ 41＋9＝ 75-15＝ 42-8＝ ... ... ... . .

"Reading Room" Addition and Subtraction PPT Courseware 2:

"Reading Room" Addition and Subtraction PPT Courseware 2 Oral calculation: 12-7＝ 10-8＝ 15-7＝ 13-6＝ 35-3＝ 56-4＝ 23-2＝ 67-7＝ 15-9＝ You start from What mathematical information is known from the graph? What math questions can you ask? ... ... ... and...

File Info

Update Time: 2024-11-20

This template belongs to Mathematics courseware Beijing Normal University Edition First Grade Mathematics Volume 2 industry PPT template

Preview