First slide

Accuracy; precision of instruments and errors in measurements

Question

If y = 2.21 x 0.3, then the number of significant digits in the value of y is_________.

Easy

Solution

$\begin{array}{l} ∵ y = 2.21 \times 0.3 = 0.663 = 0.7 \\ (T h e n u m b e r o f s i g n i f i c a n t f i g u r e s i n m u l t i p l i c a t i o n o r d i v i s i o n s h o u l d e q u a l t o m i n i m u m n u m b e r o f d e c i m a l p o i n t s o f a q u a n t i t y i n v o l v e d i n t h e o p e r a t i o n .) \\ ∴ The number of significant digit is 1 . \end{array}$

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