"Watching Acrobatics" PPT Courseware 4

Description

"Watching Acrobatics" PPT Courseware 4

learning target

1. On the basis of existing knowledge and experience, explore ways to compile the multiplication formula for 2.

2. Initially learn to use the multiplication formula of 2 to solve simple practical problems.

3. Cultivate the spirit of exploration and innovation.

think about it

(2) people on 1 pole are (1) (2), the multiplication formula is (1×2=2) or (2×1=2);

There are (4) people on 2 poles, which is (2) (2), and the multiplication formula is (2×2=4);

There are (6) people on 3 poles, which is (3) (2), and the multiplication formula is (3×2=6) or (2×3=6);

There are (8) people on 4 poles, which is (4) (2), and the multiplication formula is (4×2=8) or (2×4=8);

There are (10) people on 5 poles, which is (5) (2), and the multiplication formula is (5×2=10) or (2×5=10);

Can you summarize the multiplication formula for 2 the same way you summarize the multiplication formula for 5?

What we found:

2 people on 1 pole 1 2 1×2=2 or 2×1=2

Mantra: One or two gets two

4 people on 2 poles, the sum of 2 2s (2+2=4) 2×2=4

Rhythm: Two-two makes four

6 people on 3 poles, the sum of 3 2s (2+2+2=6) 3×2=6 or 2×3=6

Formula: two, three, six

8 people on 4 poles, the sum of 4 2s (2+2+2+2=8) 4×2=8 or 2×4=8

Formula: Two to four makes eight

10 people on 5 poles, the sum of 5 2s (2+2+2+2+2=10) 5×2=10 or 2×5=10

Formula: two five ten

Compare one to one

One or two (get two)

Two two (get four)

Two or three (get six)

Twenty-four (get eight)

Twenty-five (ten)

Compare one to two

( ) gets two

( ) gets four

( ) gets six

( ) gets eight

( )ten

application

Thinking: To solve this problem, what should we find out first?

How many red lanterns are there in total on the stage?

Compliance testing

Deskmate check:

Recite the multiplication table of 2 and see who can recite it correctly and quickly!

Talk about harvest

What did you gain from studying this class? Tell everyone!

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Update Time: 2024-07-03

This template belongs to Mathematics courseware Qingdao Edition Second Grade Mathematics Volume 1 industry PPT template

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