"Crossing the River" Mixed Operations PPT Courseware 2

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"Crossing the River" Mixed Operations PPT Courseware 2

discuss:

At least how many boats are needed? What must be calculated first, and what must be calculated second?

How many people are going to take the boat in total?

29+25=54(people)

At least how many boats are needed?

54÷9=6(bar)

Answer: At least 6 boats are needed.

54÷(9－3) (29+25)÷9

Order of operations for mixed operations with parentheses:

In a calculation, if there are parentheses, the values ​​in the parentheses must be calculated first.

2. Talk about what counts first, what counts next, and calculate.

5×(36-29)＝5×7＝35

(46+17)÷7＝63÷7＝9

81÷(16－7)＝81÷9＝9

There are 30 pots of flowers, and 18 more pots are bought. These flowers are divided equally among 8 classes. How many pots are given to each class?

(30＋18)÷8=48÷8=6(pot)

The breeding group originally had 9 rabbits, and 6 more rabbits were born. If every 5 animals are placed in a cage, how many cages are needed?

(9+6)÷5=15÷5=3(pieces)

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For more information about the PPT courseware "Mixed Operations Crossing the River", please click the Mixed Operations ppt Crossing the River ppt tag.

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Update Time: 2024-09-22

This template belongs to Mathematics courseware Beijing Normal University Third Grade Mathematics Volume 1 industry PPT template

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