Mathematics
Grade5
Easy

Question

Darcy has 568 earmuffs in stock. If she can put 18 earmuffs on each shelf, the number of shelves does she need for all the earmuffs is (estimated value) 

  1. 30
  2. 35
  3. 40
  4. 20

hintHint:

When you divide multiples of 10, 100, and 1,000 knowing your basic facts and place-value, patterns can help you find the answer.

The correct answer is: 30


    Given comma
Total space earmuffs space Darcy space has space in space stock space equals space 568
Number space of space earmuffs space she space can space put space on space each space shelf space equals space 18

To space find comma
The space number space of space shelves space she space would space need space for space all space the space earmuffs

Here comma
We space need space to space divide space total space number space of space earmuffs space she space has space by space the space number space of space earmuffs space she space can space put space on space each space shelf.
Hence comma
it space will space be space 568 space divided by space 18

Here space first comma space we space need space to space find space the space compatible space numbers space for space both.
Hence comma
568 space is space close space to space its space hundreds space place. space So comma space 568 space rounds space to space 600.
18 space is space close space to space its space tens space place. space So comma space 18 space rounds space to space 20. space space
therefore 600 space and space 20 space are space compatible space numbers.

Now comma space
Using space division space patterns comma
600 divided by 20 space equals space 60 divided by 2 space equals space 30
therefore space 600 divided by 20 space equals space 30

Here comma
30 space cross times space 20 space equals space 600
So comma space straight a space good space estimate space of space 568 divided by 18 space is space 30.

Hence comma space she space will space need space 30 space shelves space to space put space the space earcuffs.

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