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In this lesson, we will learn how to estimate the division of up to four-digit numbers by three-digit numbers by rounding or using compatible numbers.
Mariam is saving up to buy a bike that costs $99.
She gets $12 each week in pocket money.
How many weeks will she have to wait until she has enough money to buy the bike?
Which calculation will help us answer this question?
To find the number of weeks she has to wait, should we ignore the remainder or round it up?
We want to divide
by 241 using the standard division algorithm.
What result do you expect?
The diagram below shows the first stage of the division algorithm. The digit
(between 1 and 9) represents how many 241s there are in 602 tens. What
is the place value of
in the quotient?
What is the value of
We have found that there are two 241s in 602
or 241 times 2 tens
in 602 tens. The number
is 2 times 241 tens. Which of the following is
is the remainder of the previous division. Which of the
following is true?
The diagram below shows the second stage of the division algorithm. The number
is between 1 and 9 and represents the number of 241s in
. What are
the values of
Mrs.Adel is arranging a school trip for her class of 32 students. She will be going herself along with three
other teachers. She decides to use a company whose buses seat 15 people each. How many buses will she need to
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