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

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

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

Fill in the appropriate number in □:

8×□=13×□

9×4×5=9×(□×□)

(32+28)×6=□× 6+□× 6

Calculate the following questions orally:

0.1×8.1 = 0.3×0.7 = 720-580=

0.2×0.34= 0.2+0.85= 1.5×6=

3.04×1000= 0.4×0.25= 8.2+1.8=

1.4-0.9= 480÷16= 2-0.54=

Are the results on both sides of each set of equations below equal?

0.8 × 1.3 1.3 × 0.8

(Commutative law of multiplication) If two multiplied numbers are exchanged, the result remains unchanged.

(0.9 ×0.4) ×0.5 0.9 × (0.4 ×0.5)

(Associative law of multiplication) Multiply the first two numbers first, then multiply them by the third number, and multiply the last two numbers first, and then multiply them by the first number, the result remains unchanged.

(3.2 + 2.8) ×0.6 3.2 ×0.6 + 2.8 ×0.6

(Distributive law of multiplication) If the sum of two numbers is multiplied by a number, then the sum of the two numbers multiplied by the number remains unchanged.

practice

Calculate the following questions orally

2.5 ×0.4 = 7.3 +2.7= 1.25 ×8=

0.21 ×200 = 15.7 -14.7 = 28.6 ×100=

0.8 ×1.25 = 1.5 × 6 = 0.25 ×400=

Calculate the following problems and apply the commutative law of multiplication to check

3.5 ×4.8= 0.37 ×0.25= 1.9 ×0.18=

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For more information about the PPT courseware "Decimal multiplication and division, the law of integer multiplication is extended to decimals", please click the Decimal multiplication and division ppt, the law of integer multiplication is extended to decimals ppt tag.

"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...

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

"Extension of the Laws of Multiplication Operations of Integers to Decimals" Decimal Multiplication and Division PPT Courseware Teaching Objectives 1. Knowledge Objective: Be able to skillfully apply the laws of operation of integers to decimals, and be able to perform simple calculations on decimals. 2. Ability goal: Establish everyone’s awareness of migration and be able to do...

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Update Time: 2024-11-18

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