Fractions, decimal point and strip
100-cell strip: color, code as a decimal, place on the number line, sort.
A 100-cell strip stands for the unit 1. Color 30 of them and you've colored 30/100 = 3/10 = 0.3 — the same amount written three ways. Four short exercises help you switch between writings.
- Color: fill in exactly the requested fraction.
- Decode: the strip is colored, find the fraction and the decimal.
- Place: drag the cursor onto the requested number.
- Sort: put the numbers in increasing order.
Learning objectives
- Grade 4Discover decimal fractions in tenths using the 100-cell strip. Build the equivalence between a fraction n/10, its decimal notation and a position on the number line. Work only with values between 0 and 1.
- Grade 5Extend to hundredths (n/100) and to decimals greater than 1. Compare and order decimals in increasing order. Consolidate reading and writing decimals down to the hundredth.