"Mixed Operations of Rational Numbers" Rational numbers and their operations PPT courseware

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"Mixed Operations of Rational Numbers" Rational numbers and their operations PPT courseware

Please compare the formulas for the volume of the cube:

4×4×4 and the number formula after cell division ten times:

What do they have in common?

Answer: They are both multiplications; and their respective factors are the same.

This kind of operation is called exponentiation operation.

Power: the operation of finding the product of n identical factors a.

Write the following expressions in power form:

(-4)× (-4)× (-4)＝(-4)³;

- 4 × 4 × 4＝-4³;

(-2/3)×(-2/3)×(--)=

Thinking: Talk about the meaning of the following numbers. Are they the same?

Note: When the base is a negative number or a fraction, the base must be added in parentheses. This is also the way to identify the base.

(1) The even powers of a positive number are positive; the even powers of a negative number are positive, and the odd powers of a negative number are negative.

(2) For 10n, there are n zeros after 1

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"Mixed Operations of Rational Numbers" PPT courseware 4:

"Mixed Operations of Rational Numbers" PPT Courseware 4 1. Rules for mixed operations of rational numbers: (1) Calculate exponentiation first, then multiplication and division, and finally addition and subtraction. (2) If there are parentheses, perform the operations in the parentheses first. Operations in parentheses: exponentiation, multiplication, division, addition and subtraction Summary: 1. have..

"Mixed Operations of Rational Numbers" PPT courseware 3:

"Mixed Operations of Rational Numbers" PPT Courseware 3 Mixed Operations of Rational Numbers Addition of the same sign takes the same sign absolute value addition of different signs takes the sign of the larger absolute value absolute value subtraction subtraction subtracting a number is equal to adding the opposite of the number multiplication Take the positive absolute value with the same sign..

"Mixed Operations of Rational Numbers" PPT courseware 2:

"Mixed Operations of Rational Numbers" PPT Courseware 2 Learning Objectives 1. Be able to correctly and skillfully perform mixed operations of addition, subtraction, multiplication, division and exponentiation of rational numbers according to the order of operations of rational numbers. 2. Be able to rationally use the laws of operations to simplify operations in operations. 3. Cultivate and improve positive...

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Update Time: 2024-11-21

This template belongs to Mathematics courseware Beijing Normal University seventh grade first volume mathematics industry PPT template

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