Question

Four lengths are measured as 18.425 cm, 7.21 cm, 5.40 cm, and 10.3571 cm. Taking significant figures into account, the sum of the lengths should be​

Answer 1

$\Large\mathtt\green{ }\huge\underline\mathtt\red{Answer : }$

7.21+50+18.425=30.635

In additional sum must have equal no f decimal points as in the number with least digits after decimals

∴5.0→ no after decimal

⇒ answer should be rounded to 1 decimal place

sum=30.6.

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Answer 2

$\huge \bigstar { \underline{ \mathtt{ \red{A}{ \pink{n}{ \color{blue}{s}{ \color{gold}{w}{ \color{aqua}{e}{ \color{lime}{r}}}}}}}}}★$

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7.21+50+18.425-30.635

In additional sum must have equal no f decimal points as in the number with least digits after decimals

:.5.0➡ no after decimal

→ Answer should be rounded to 1 decimal place

sum=30.6.

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Hope it's helpful to you