"Extension of the Law of Multiplication of Integers to Decimals" Decimal Multiplication and Division PPT Courseware

Description

"Extension of the Law of Multiplication of Integers to Decimals" Decimal Multiplication and Division PPT Courseware

teaching objectives

1. Knowledge objectives: Be able to skillfully apply the laws of integer operations to decimals, and be able to perform simple calculations on decimals.

2. Ability goal: Establish everyone's awareness of migration, be able to draw inferences from one example, and learn and apply it flexibly.

3. Emotional goal: Cultivate the habit of reviewing the past and learning new things.

Let’s first talk about the order of operations for each question, and then calculate.

12×5×60

30×7＋85

250×4－320

①The order of operations for continuous multiplication of integers is: from left to right;

②The order of mixed operations of multiplication, addition, and multiplication and subtraction of integers is: multiplication first, then addition or subtraction.

How do you express the laws of integer multiplication using letters?

Commutative law of multiplication: a×b = b×a

Multiplicative associative law: (a×b)×c=a×(b×c)

Distributive law of multiplication: (a+b)×c=a×c + b×c

Fill it out

4.2×1.69＝□×□

2.5×0.77×0.4=(□×□)×□

6.1×3.6+3.9×3.6=(□×□)×□

Summary of this lesson

Through the exercises in this lesson, we have understood that the laws of integer operations can also be applied to decimals, and can make complex calculations simple and fast. This is the fundamental purpose of learning this lesson.

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"Extension of the Law of Multiplication of Integers to Decimals" Multiplication and Division of Decimals PPT Courseware 3:

"Extension of the Law of Multiplication of Integers to Decimals" Decimal Multiplication and Division PPT Courseware 3 Fill in the appropriate numbers in □: 8□=13□ 94 5=9 (□□) (32+28) 6=□ 6+□ 6 Calculate the following questions orally: 0.18.1 = 0.30.7 = 720－580= 0.20.34= ..

"Extension of the Law of Multiplication of Integers to Decimals" Multiplication and Division of Decimals PPT Courseware 2:

"Extension of the Law of Multiplication of Integers to Decimals" Decimal Multiplication and Division PPT Courseware 2 Review Without calculation, directly connect the equations with equal numbers in the upper and lower rows with lines. 712 8( 54) (24+36) 5 (85)4 245+365 127 Please think carefully about the use of...

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Update Time: 2024-11-25

This template belongs to Mathematics courseware Jiangsu Education Edition Fifth Grade Mathematics Volume 1 industry PPT template

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