There are 56 students in the class. If each student has 17 notebooks, the estimated number of notebooks in the class will be ____. (Round off to the nearest tens)
A
1,400
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B
900
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C
1,200
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D
1,000
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Solution
The correct option is C 1,200 Say: ∙ Estimation is approximating the given value to make the calculation easier.
∙ Round off the given numbers to the nearest tens.
Steps: ∙ How many students are there in the class?
Ans: 56
∙ What is the estimated value of 56?
Ans: 60 (WB1)
∙ How many notebooks each student has?
Ans: 17
∙ What is the estimated value of 17?
Ans: 20 (WB1)
∙ Which operation do we have to use to find the estimated number of notebooks?
Ans: Multiplication
∙ What is the estimated number of notebooks in the class?
Ans: 60 × 20 = 1,200 (WB2)