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What is 7.351 round to 1 decimal place?

Answer 1

Jeremiah Andrews

7.4

Given: #7.351#

Just for demonstration I am going to insert the part of the number we are interested in inside square brackets.

Write #7.351" as "[color(white)(2/2)7.3]51#

The number immediately to the right of the closing bracket is 5.

The general rule is:

#color(brown)("If the trailing number ( my choice of wording) is 5 or more then we")# #color(brown)("round up. If the 'trailing number' is less than 5 we round down.")# #color(brown)("By 'rounding down' they mean that the number part inside the")# #color(brown)("brackets is left as it is and the number part outside is discarded")#

#" "5>=5" so round up"#

#" "bar(ul(|color(white)(2/2) "So "7.351 =7.4" to 1 decimal place"color(white)(2/2|))| )# '~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Just to make the process clearer

Suppose we had #[color(white)(2/2)7.3]21#

#2<5# so we round down giving #7.3#

Suppose we had #[color(white)(2/2)7.3]61#

#6>5# so we round up giving #7.4#

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Answer 2

Gabriel Agustin

7.4

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.