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"Understanding Calculator" Use Calculator to Calculate PPT Courseware
Questions for group exploration
1. Tell me what you know about calculators.
2. What are the external characteristics, basic structure and basic functions of a calculator?
3. What are the functions and operation methods of the main keys of the calculator?
How many ancient trees are there in Hongmen, Zhongtianshan and Nantianmen?
3449+527+1640 =( )(tree)
Answer: There are a total of 5,616 ancient trees in Hongmen, Zhongtianshan and Nantianmen.
Talk to your partner about the process and steps you use to calculate using a calculator.
independent practice
A faucet that is not closed tightly will drip about 18 kilograms of water every day, and this water will be drained away in vain...
According to this calculation, a faucet that is not closed tightly will waste ( ) kilograms for two years (calculated as 365 days a year).
Put this water in drinking buckets (each bucket is calculated as 15 kilograms). The water can fit into approximately ( ) buckets.
If a family of three uses 6 barrels of water every month, this water is enough for ( ) months, which is about ( ) years.
summary
In practical applications, we should use the calculator reasonably according to actual needs. We should not rely too much on the calculator for calculations, but should use it in practical applications.
(1) According to this calculation, a faucet that is not closed tightly will waste ______ kilograms a year (calculated based on 365 days).
(2) Put the water in drinking buckets (each bucket is calculated as 20 kilograms). The water can fit into approximately ______ buckets.
(3) If a family of three uses 6 barrels of water every month, this water is enough for ______ months, which is about ______ years.
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