library, there are 9 rectangular tables with 8 pupils each and square tables with 4 pupils each. How many square tables are needed so that 100 pupils can read at the same time
Answer:
7 square tables are needed so that 100 pupils can read at the same time.
Step-by-step explanation:
What is asked?
The number of square tables needed so that 100 pupils can read at the same time.
What are the given?
the number of rectangular tables – 9
the number of pupils in each rectangular table – 8
the number of pupils in each square table – 4
the total number of pupils – 100
What operation will be used?
Multiplication and Subtraction
What is the hidden question?
How many pupils are going to use the square tables?
What is the number sentence?
(100-9 × 8) + 4 = N
Write the solution.
(100-9 x 8) 4
= (100-72) ÷ 4
= 28 ÷ 4
= 7
7 square tables are needed so that 100 pupils can read at the same time.
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