"The Size of Rational Numbers" PPT courseware

Description

"The Size of Rational Numbers" PPT courseware

learning target

Able to compare the magnitude of two rational numbers with the help of a number line

Able to use absolute value to compare the size of two negative numbers

Students should develop the good qualities of being good at independent thinking and willing to cooperate and communicate.

What is the relationship between the order of the above numbers and the position of the points on the number axis?

For the numbers represented by two different points on the number axis, the number represented by the right point is always greater than the number represented by the left point.

Of course there must be: negative numbers are less than 0, 0 is less than positive numbers, and negative numbers are less than positive numbers.

Please come and practice

1. Fill in the blanks (fill in the “＞” or “＜” sign)

(1)3___14 (2)7___-6

(3)0.02___0 (4)-12___-3

2. Express the following numbers on the number line and connect them with ">":

-2, 3, 0, -3.5, 12,

think for a while:

1Represent each of the following pairs of numbers on the number line and compare their sizes.

(1) -1 and -1.5 (2) -2/5 and -1/4

(3)-2 and -2.5 (4)-10 and -0.1

2. Find the absolute value of each logarithm in the above question and compare their sizes.

3. After doing the above two questions, what patterns did you discover?

Note: Example question format of comparing two negative rational numbers

For example, compare the sizes of -2 and -5

Solution: Because |-2|=2, |-3|=3 (calculate the absolute value first)

2<3 (then compare the absolute value)

So -2>-3 (Finally get the size of the original number, pay attention to the change of the inequality sign)

Knowledge feedback:

Now please try to complete exercises 1, 2, 3.(3).(4) of P15.

After completion, the tablemates communicated with each other to make corrections and scores, and signed their names.

Summary of new lessons:

After studying this section, each student has different gains and feelings. Which student can boldly talk about his own remarks.

Keywords: teaching courseware on the size of rational numbers, download the Hebei Education Edition seventh grade mathematics PPT courseware for the first volume, download the seventh grade mathematics slide courseware, download the PPT courseware on the size of rational numbers, .PPT format;

For more information about the PPT courseware "The Size of Rational Numbers", please click the "The Size of Rational Numbers" ppt tag.

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Update Time: 2024-07-01

This template belongs to Mathematics courseware Hebei Education Edition Seventh Grade Mathematics Volume 1 industry PPT template

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