Addition and subtraction of numbers in standard form

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Stanislav Duris

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Stanislav Duris

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Ready to use

7 years, 9 months ago

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Stanislav Duris 7 years, 9 months ago

Published this.

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Stanislav Duris 7 years, 9 months ago

Gave some feedback: Ready to use

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Stanislav Duris 7 years, 9 months ago

Gave some feedback: Needs to be tested

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Stanislav Duris 7 years, 9 months ago

Created this as a copy of Working with standard index form .

Name	Status	Author	Last Modified
Working with standard index form	Ready to use	Stanislav Duris	20/11/2019 14:46
Converting from standard index form to decimal.	Ready to use	Stanislav Duris	08/06/2020 16:54
Addition and subtraction of numbers in standard form	Ready to use	Stanislav Duris	20/11/2019 14:47
Multiplication and division of numbers in standard index form	Ready to use	Stanislav Duris	01/04/2020 09:10
Multiplication and division of numbers in standard index form [L0 Randomised]	Needs to be tested	Matthew James Sykes	25/07/2018 10:21
Katy's copy of Working with standard index form	draft	Katy Dobson	03/09/2019 08:29
Ugur's copy of Working with standard index form	Ready to use	Ugur Efem	08/11/2021 16:45

There are 35 other versions that do you not have access to.

Question statement

Calculate the following and write the result in standard index form (for example, for $2.01\times 10^5$ we would write 2.01*10^5 in the gap).

Give any introductory information the student needs.

			Name	Type	Generated Value

list

[ 6.92, 6.5, 5.36 ]

Automatically regenerate variables?

Name

Data type

Value

xxxxxxxxxx
 
repeat(random(3..9 #0.01), 3)

JME function reference

Description

Describe what this variable represents, and list any assumptions made about its value.

Can an exam override the value of this variable?

Generated value: `list`

[ 6.92, 6.5, 5.36 ]

This variable doesn't seem to be used anywhere.

Parts

Part a) Gap-fill
1. Gap Mathematical expression
  Add
Part b) Gap-fill
1. Gap Mathematical expression
  Add

Gap-fill

Ask the student a question, and give any hints about how they should answer this part.

$\var{B[0]} \times 10^3 + \var{B[1]} \times 10^4 =$ Unnamed gap

Advice

The easiest way to do this is to convert these numbers in standard form into decimals, do the calculation with decimal forms, then change them back into standard form.

a)

$\begin{align} \var{B[0]} \times 10^3 + \var{B[1]} \times 10^4 &= \var{B[0]*10^3} + \var{B[1]*10^4} \\&= \var{B[0]*10^3 + B[1]*10^4} \\&= \var{(B[0]*10^3 + B[1]*10^4)/10^4} \times 10^4\end{align}$

b)

$\begin{align} \var{B[2]} \times 10^3 - \var{B[2] - 1.70} \times 10^2 &= \var{B[2]*10^3} - \var{(B[2] - 1.70)*10^2} \\&= \var{(B[2]*10^3) - ((B[2] - 1.70)*10^2)} \\&= \var{(B[2]*10^3 - (B[2] - 1.70)*10^2)/10^3} \times 10^3\end{align}$

Give a worked solution to the whole question.

Use this tab to check that this question works as expected.

There was an error which means the tests can't run:

Part	Test	Passed?
Gap-fill
Gap-fill		Hasn't run yet
Mathematical expression
Mathematical expression		Hasn't run yet
Gap-fill
Gap-fill		Hasn't run yet
Mathematical expression
Mathematical expression		Hasn't run yet

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Addition and subtraction of numbers in standard form

Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

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Checkpoint description

Stanislav Duris 7 years, 9 months ago

Stanislav Duris 7 years, 9 months ago

Stanislav Duris 7 years, 9 months ago

Stanislav Duris 7 years, 9 months ago

Error in variable testing condition

Error

Warning

Generated value: `list`

Parts

Gap-fill

a)

b)

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Error

Addition and subtraction of numbers in standard form

Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

Contributors

Feedback

History

Comment

Checkpoint description

Stanislav Duris 7 years, 9 months ago

Stanislav Duris 7 years, 9 months ago

Stanislav Duris 7 years, 9 months ago

Stanislav Duris 7 years, 9 months ago

Error in variable testing condition

Error

Warning

Generated value: list

Parts

Gap-fill

a)

b)

Generated value: `list`