Simplify: $7.5 - 3.2 + 4.6$

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Solution

By grouping positive and negative numbers separately, we have
$(7.5 + 4.6) - 3.2$
$7.5 + 4.6 12.1$ $12.1 - 3.2 8.9$
Hence, $7.5 - 3.2 + 4.6 = 8.9$

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Similar questions

Q. A company manufactures car batteries of a particular type. The lives (in years) of 40 such batteries were recorded as follows:

\begin{matrix} 2.6 & 3.0 & 3.7 & 3.2 & 2.2 & 4.1 & 3.5 & 4.5 3.5 & 2.3 & 3.2 & 3.4 & 3.8 & 3.2 & 4.6 & 3.7 2.5 & 4.4 & 3.4 & 3.3 & 2.9 & 3.0 & 4.3 & 2.8 3.5 & 3.2 & 3.9 & 3.2 & 3.2 & 3.1 & 3.7 & 3.4 4.6 & 3.8 & 3.2 & 2.6 & 3.5 & 4.2 & 2.9 & 3.6 \end{matrix}

Construct a grouped frequency distribution table for this data, using class intervals of size

0.5

starting from the interval

2 - 2.5

Question 9
A company manufactures car batteries of a particular type. The lives (in years) of 40 such batteries were recorded as follows:
$\begin{matrix} 2.6 & 3.0 & 3.7 & 3.2 & 2.2 & 4.1 & 3.5 & 4.5 3.5 & 2.3 & 3.2 & 3.4 & 3.8 & 3.2 & 4.6 & 3.7 2.5 & 4.4 & 3.4 & 3.3 & 2.9 & 3.0 & 4.3 & 2.8 3.5 & 3.2 & 3.9 & 3.2 & 3.2 & 3.1 & 3.7 & 3.4 4.6 & 3.8 & 3.2 & 2.6 & 3.5 & 4.2 & 2.9 & 3.6 \end{matrix}$
Construct a grouped frequency distribution table for this data, using class intervals of size 0.5 starting from the intervals 2−2.5.

Q. Simplify :

[0.9 - {2.3 - 3.2 - 3.2 - (7.1 - 5.4 - 3.5)}]

Simplify:

$2.67 + 3.2 - 6.704 + 11.23$

Simplify the following:

$7.5 + 0.75 + 7.705$

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Simplify: 7.5-3.2+4.6

By grouping positive and negative numbers separately, we have(7.5+4.6)-3.27.5+4.612.1 12.1-3.28.9Hence, 7.5-3.2+4.6=8.9

Simplify: $7.5 - 3.2 + 4.6$

By grouping positive and negative numbers separately, we have
$(7.5 + 4.6) - 3.2$
$7.5 + 4.6 12.1$ $12.1 - 3.2 8.9$
Hence, $7.5 - 3.2 + 4.6 = 8.9$