Estimate the lengths of the following and compare your responses with your friends, in the grade. Write some examples of things that can be lesser than or equal to 1 cm in length. Verify by measuring.
Examples of items:
Approximately 1 cm: A fingernail is approximately 1 cm wide. A rajma seed is approximately 1 cm.
Less than 1 cm: An ant is less than 1 cm. A grain of wheat is less than 1 cm.
More than 1 cm: An eraser is more than 1 cm.
Verification: Students verify these estimates by actual measurement using a centimetre scale.
Explanation
The chapter encourages students to estimate lengths before measuring. Small items like fingernails, ants, seeds, and grains help students understand the size of 1 centimetre through practical comparison.
Solution Steps
List items approximately 1 cm: fingernail, rajma seed.
List items less than 1 cm: ant, grain of wheat.
List items more than 1 cm: eraser.
Verify estimates by actual measurement using a centimetre scale.