22
Near Integers
Junior high school
• • • • • • • • • • • • • • • • • • • • • Objective • • • • • • • • • • • • • • • • • • • • •
Understand and use the concept of place value in decimals.
Understand and use decimals and fractions while comprehending the interrelationship between
them.
Use some common properties of numbers, including multiples.
Give solutions in the context of the problem, selecting the appropriate degree of accuracy and
interpreting the display on a calculator.
• • • • • • • • • • • • • • • Explanation of the activity • • • • • • • • • • • • • •
Use the calculator to find fractions that are near integers in decimal form.
While working on this activity, students will be developing their understanding of decimals,
particularly their relationship with fractions.
• • • • • • • • • • • • • • • • • Using the calculator • • • • • • • • • • • • • • • • •
Calculator functions used: Multiplication, division
The 35th multiple of 0.3
1
4 is
1
0.99.
35 x 0.3
1
4 =
1
0.99
35
0.3
1
4
1
0.99 is a ‘near integer’; it is nearly
11
.
Using fractional calculation, input
.
11
35
Convert
to decimal notation.
Using division, divide
11
by 35.
The fraction
has a decimal value close to 0.3
1
4.
11
35
Press the following buttons and then start operation.
11
÷
35=
DEG
11 35=
DEG
35X0.314=
DEG
11 35=
DEG
Summary of Contents for EL-531RH
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