"Two digits plus one digit (carry)" PPT courseware for addition and subtraction within 100

Description

"Two digits plus one digit (carry)" PPT courseware for addition and subtraction within 100

1. Review old knowledge

How do you calculate 24+5?

4+9＝

3+7=

6＋8＝

2. Explore new knowledge

(1) Introduction of situations and raising questions

What math questions can you ask?

How many bottles of mineral water are there in total?

(2) Exploration algorithm

Tell me how you calculate 24+9.

First calculate 24+6=30,

Then calculate 30＋3=33.

Tell me how you calculate 24+9.

(3) Observation and comparison

What we learned today is 24+9, and the individual positions add up to ten.

What is the difference between the two-digit plus one-digit number learned in this lesson and the two-digit plus one-digit number learned before?

3. Application of knowledge

(1) Make a circle first and then calculate

(2) Fill in the number in ( )

When adding a two-digit number to a one-digit number, if the units digits add up to less than ten, the tens digit remains unchanged; if the units digits add up to ten, 1 must be added to the tens digit.

(3) Help the bird find a home

4. Assign homework

Homework: Exercise 15 on page 66, questions 5 and 6.

Keywords: Courseware for addition and subtraction within 100, courseware for adding two digits to one digit, and integers, PPT courseware for the second volume of the first grade of the New People's Education Press, downloadable first grade mathematics slide courseware, addition and subtraction within 100 PPT courseware download, two digits plus one digit, whole ten PPT courseware download, .ppt format

For more information about the PPT courseware "Addition and subtraction of two-digit numbers plus one-digit integers within 100", please click the Addition and subtraction of two-digit numbers within 100 plus one-digit integers ppt tag.

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Update Time: 2024-09-29

This template belongs to Mathematics courseware People's Education Press first grade mathematics volume 2 industry PPT template

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