NCERT Solutions Ganita Prakash Chapter 7 In-text Questions — Measuring Using Fractional Units
Book page 156 & 157 Updated on2026-09-05
Q1.
Fold the strip into two equal parts and then open up the strip again. Taking the strip to be one unit in length, what are the lengths of the two new parts of the strip created by the crease?
Answer
The crease cuts the one-unit strip into 2 equal parts.
Each part = 1 ÷ 2 = 1/2 unit
Check: 1/2 + 1/2 = 2/2 = 1 unit ✔
Answer: both parts are 1⁄2 unit long.
Q2.
What will you get if you fold the previously-folded strip again into two equal parts?
Answer
Each half is folded into two, so the strip now has 4 equal parts and each part is 1⁄4 unit.
2 times 1/4 = 2/4
3 times 1/4 = 3/4
4 times 1/4 = 4/4 = 1
Why: folding into two doubles the number of parts each time — 1 → 2 → 4 → 8 — so the fractional unit becomes half as long at every fold.
Q3.
Do it once more! Fill in the blank boxes. (2 times 1⁄8 = __, 4 times 1⁄8 = __, 6 times 1⁄8 = __, 8 times 1⁄8 = __)
Answer
One more fold gives 8 equal parts, so the fractional unit is now 1⁄8.
2 times 1/8 = 2/8 = 1/4
4 times 1/8 = 4/8 = 1/2
6 times 1/8 = 6/8 = 3/4
8 times 1/8 = 8/8 = 1
Did you notice? The folded strip shows equivalent fractions all by itself: 2⁄8 = 1⁄4, 4⁄8 = 1⁄2, 6⁄8 = 3⁄4.