Use Fraction Strips to represent, compare, order, and operate on fractions. Represent fractions by dragging pieces from the fraction tower into the workspace. Pieces can be placed in a line to form a train. Manipulate the pieces and trains to compare and order fractions or to model fraction operations.
Access a wide variety of Annotation tools to communicate thinking. Insert pictures into the tool.
Work created in a mathies tool can be saved and opened.
A saved file can be shared with peers or submitted to a teacher. The file will contain all solution steps from start to finish.
Take a screenshot to use as part of a portfolio, presentation, web page, etc.
apply estimation skills to operations with whole numbers and fractions
Developing proficiency with operations:
Performing calculations with ease, precision, and consistency and with a general understanding of number and operations, number properties, and their appropriate application in problem solving.
Fraction Strips can be used to:
recognize the inverse relationship between addition and subtraction (e.g., since 1/6 + 1/3 = 1/2, then 1/2 - 1/6 = 1/3).
recognize the inverse relationship between multiplication and division (e.g., since 1/2 x 6 = 3, then 3 ÷ 1/2 = 6).
demonstrate the relationship between the repeated addition of fractions and the multiplication of that fraction by a whole number
Align trains using the built-in snapping feature.
Zoom infor more precision.
Rulers, when shown, will illuminate ticks in red if a piece ends exactly in that spot.
Create a vertical comparison bar to track a position between trains. top
The equivalence bar in the tower can be dragged to reveal equivalent fractions in the tower.
The ruler can be shown, with steppers that change the fractional unit (e.g., from thirds to sixths), to assist with renaming fractions. top
Place pieces beside or between each other, to combine fractions and perform addition.
On desktop, click on the image above to open this file.
Division of fractions can be a challenging topic. It is useful for students to understand different ways of thinking about division.
One way to approach the division of a fraction by a whole number is to split the fraction into equal pieces as in the example below.
Comparing this division example to the multiplication example above, students may recognize that the action of dividing a quantity by 4 is the same as finding one-fourth of that quantity. This is one illustration of the invert and multiply algorithm.
When dividing one fraction by another fraction, one way to think about the problem is to ask, "how many of the second quantity fits into the first quantity". In the following example, the student is asked to think about how many one-fourth pieces fit into the one-half piece.
Here the answer is 2 which is a whole number. See the Ribbon Problem below for an example where the quotient is not a whole number.
See the Gazette article for more details about multiplying and dividing fractions with Fraction Strips.
choose a colour palette (Rainbow, Original, or One Colour)
include or exclude strips in the tower
change the colour of the strips and the related pieces in the workspace
restore the tower to its default state
not showing rulers
showing rulers and stepper arrows
Note: Clicking the stepper arrows changes the number of tick marks in a whole.
The ticks are illuminated in red if a piece ends exactly at that position.
Create a Comparison Bar
A comparison bar is a grey, vertical line that is useful to compare fraction strips, especially when the left edges are aligned.
Multiple comparison bars can be created. The length of a bar, its colour and its thickness can be modified.
English / French
Switch between English and French.
Zoom In / Zoom Out
Use the zoom in buttonto make the pieces look bigger. This is useful for more precise comparison, especially when working with small fractions.
Use the zoom out buttonto see more of the workspace. The fraction pieces will look smaller.
If using a mouse use the mouse wheel to zoom in and out.
If pieces are selected the zooming will be centered around the selected pieces.
On touch screen devices use the pinch-to-zoom gesture on an empty space to zoom in and out.
Zoom To Fit
Zoom the workspace so that all the fraction pieces are visible. Pieces may be resized and/or repositioned as a result.
On desktop, use the scroll bars.
On touch screen devices, use a two finger slide gesture on an empty space.
Drag to highlight equivalent fractions in the tower.
To move the tower, drag it by the dark blue area at the very top.
Change Tower Height
Drag to adjust the height of the tower. If the tower is made too small, a scroll bar will be displayed, allowing hidden strips to be revealed.
Make notes or highlight various features of the representation. More details.
Step backward or forward through the actions with the tool.
This feature is not only useful for backtracking when a misstep is made, it enables a student to demonstrate their work from the start to the finish. The student can press Undo until they are at the start of their solution and then press Redo repeatedly, explaining each step.
Note: Undo / Redo is not available for annotation objects.
Return the tool to its original state.
All objects in the workspace will be deleted and the settings will be restored to their defaults.
Shows a dialog with a link to this support page, a feedback form as well as copyright details and version number.
Show the Settings dialog to:
open a previously saved Fraction Strips file (work will be centered and fitted to the window automatically)
Gazette Articles September 2017 - Representing, Comparing and Ordering Fractions, Equivalent Fractions, Addition and Subtraction of Fractions using the Fraction Strips Tool December 2017 - Multiplication and Division of Fractions using the Fraction Strips Tool