# 6th Grade Number Sense Resources

## Decimal in Three Forms

Establish the decimal/fraction/percent connection by seeing three connected representations of a number [0,1). ## Filling the Number Line

How do the non-negative rational numbers map to the number line? How big do the numerator and denominator need to be to make it "full"? Is it even possible? Explore some of these questions and many others (like finding patterns in equivalent fractions) with this simple, but powerful applet. ## Four Numbers

Place 4 randomly generated rational numbers on the number line. Feedback provided. Note that this version uses positive and negative numbers (but the GIF shows the fifth grade version using only positive numbers). ## Given Part, Find Whole

Use proportional reasoning to estimate the size of a rectangle. Meant to develop intuitive understanding of unit rate. ## Guess the Sort - Whole Number Rules

Enter a whole number, and the program will sort it in the Venn Diagram according to the two randomly determined rules. Play along with your students as you try various numbers to figure out the rules. Once you know the rules, add additional numbers to each part of the diagram. Possible rules include: bove or below a certain number; Rounds within 100 to a 10; Rounds within 1000 to a 100; Multiple of 3,4,5,6,7,8,9,10,11,or 12; Prime; Composite; Even; Odd ## Seeing Factors

Designed to give an understanding of factors and prime/composite numbers. Enter an integer, then see it arranged in arrays. Move the slider to see the resulting array for various divisors. ## Tape Diagram

A simple tool that allows you to draw and compute with ratios using a tape diagram. ## What's the Number? -- Decimal Version

Set the bounds (-1000 to 1000) and the level of precision (wholes, tenths, hundredths, thousandths). Then a random number is generated and placed on a blank number line. Your job is to guess where it landed. Click "next" to zoom in and refine your guess. 