| Category | Format | Size |
|---|---|---|
| Beijing Normal University seventh grade first volume mathematics | pptx | 6 MB |
"Rational Numbers" Rational numbers and their operations PPT courseware 2
Description
"Rational Numbers" Rational numbers and their operations PPT courseware 2
(1). In a knowledge contest, if +10 points means adding 10 points, how do you express deducting 20 points?
Solution: (1) Deduct 20 points and record it as -20 points
(2) When someone turns the turntable, if +5 turns means 5 turns in the counterclockwise direction, how does it mean 12 turns in the clockwise direction?
Turning 12 times clockwise is recorded as -12 times
(3) In a certain table tennis quality inspection, a table tennis ball exceeding the standard mass by 0.02 grams is recorded as +0.02 grams. So what does -0.03 grams mean?
-0.03g means that the mass of the table tennis ball is lower than the standard mass of 0.03g.
Intellectual arena
1. Are there any rational numbers that are neither positive nor negative?
2. One evening, the temperature in Huangshan Mountain dropped by 7 degrees from 2 degrees above zero at noon. What was the temperature in Huangshan Mountain that evening?
3. The temperature in Huangshan Mountain dropped from 2 degrees above zero at noon to minus 7 degrees in the evening. How many degrees did the temperature drop?
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For more information about the "Rational Numbers Rational Numbers and Their Operations" PPT courseware, please click the Rational Numbers ppt Rational Numbers and their Operations ppt tag.
"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..
"Power of Rational Numbers" PPT courseware 4:
"Power of Rational Numbers" PPT Courseware 4 Collaborative Exploration 1: Fold in half twice and you can cut into 4 pieces, that is, 22 pieces; Fold in half three times and you can cut into 8 pieces, that is, 222 pieces; Question: If you fold in half 10 times, how many pieces can you cut into? ? Please use a formula to express it (no need to calculate the result). If you fold it in half 100 times, the formula...
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Update Time: 2024-06-27
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