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"Mixed Operations of Rational Numbers" PPT Courseware 4
one. 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 and division, addition and subtraction
summary:
1. The order of mixed operations on rational numbers:
It is basically the same as the four mixed operations learned in primary school mathematics, except for the addition of exponentiation operations.
2. Memorize the order of mixed operations of rational numbers.
3． When operating, the order of operations must be considered according to the rules.
Do you know how to play the "24 point" game?
Randomly select 4 cards from a deck of playing cards (excluding the big and small kings), and perform a mixed operation based on the numbers on the cards (each card can only be used once), so that the operation result is 24 or -24. The red playing cards represent negative numbers, the black playing cards represent positive numbers, and J, Q, and K represent 11, 12, and 13 respectively.
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