7th Grade Math Signed Number Operations Unit Test

<p>Find the sum of `-2` and `-10` using the model below.</p> <SignTiles data-props='{ "items": [ { "signs": [ { "value": "-", "color": "red", "highlight": false, "disabled": false } ], "highlight_pair": false }, { "signs": [ { "value": "-", "color": "red", "highlight": false, "disabled": false } ], "highlight_pair": false } ]}'></SignTiles > + <SignTiles data-props='{ "items": [ { "signs": [ { "value": "-", "color": "red", "highlight": false, "disabled": false } ], "highlight_pair": false }, { "signs": [ { "value": "-", "color": "red", "highlight": false, "disabled": false } ], "highlight_pair": false }, { "signs": [ { "value": "-", "color": "red", "highlight": false, "disabled": false } ], "highlight_pair": false }, { "signs": [ { "value": "-", "color": "red", "highlight": false, "disabled": false } ], "highlight_pair": false }, { "signs": [ { "value": "-", "color": "red", "highlight": false, "disabled": false } ], "highlight_pair": false }, { "signs": [ { "value": "-", "color": "red", "highlight": false, "disabled": false } ], "highlight_pair": false }, { "signs": [ { "value": "-", "color": "red", "highlight": false, "disabled": false } ], "highlight_pair": false }, { "signs": [ { "value": "-", "color": "red", "highlight": false, "disabled": false } ], "highlight_pair": false }, { "signs": [ { "value": "-", "color": "red", "highlight": false, "disabled": false } ], "highlight_pair": false }, { "signs": [ { "value": "-", "color": "red", "highlight": false, "disabled": false } ], "highlight_pair": false } ]}'></SignTiles >

<p>Find the value of `-9 + (-3)`</p>

<p>Find the value of `22 - 98`.</p>

<p>Find the value of `-2/9 - 4/9`.</p><p><highlight data-color="#666" data-style="italic">Write your answer as a fraction in the simplest form.</highlight></p>

<p>Find the value of `-11/12 - 3/4`.</p><p><highlight data-color="#666" data-style="italic">Write your answer as a fraction in the simplest form.</highlight></p>

<p>Find the value of `3 7/8 × (-5/3)`.</p><p>Write your answer as a fraction in the simplest form.</p>

<p>Find the value of `(3/4) ÷ (-2/3)`.</p>

<p>Find the value of `(4 1/2) / (-7/4)`.</p>

<p>Find the value of `(-6) * (-3.35)`</p>

<p>Find the value of `(-6.4) * (9.8)`</p>

<p>Find the value of `-99 ÷ (-9)`.</p>

<p>Find the value of `0.5 ÷ (-8)`.</p>

<p>A cave diver ends up `-50` feet elevation. This is after he descended `30` feet. </p> <p>What was his original elevation?</p>

<p>Dan’s savings balance was `-$422.51`. The amount of `$390.25` is deposited in his account in one month. </p> <p>What is Dan’s savings balance after one month?</p>

<p>Sasha recorded the changes in temperature, in °C, throughout the day:</p><p>`10`°C, `-1`°C, `8`°C, `4`°C, `-2`°C.</p><p>In the morning, the temperature was `-13` °C, what was the temperature at night?</p>

<p>At the beginning of the month, Graham’s bank statement showed the following deposits and withdrawals:</p><p>`-$25.20`, `$52.75`, `-$22.04`, `-$8.50`, `-$52.11`</p><p>If the balance at the beginning of the month was `$47.86`, what was the balance at the end of the month?</p>

<p>Find the value of `-32 ÷ (-8)`.</p>

<p>A team of miners started at an elevation of `-0.5` feet. After digging for `5` hours, they reached an elevation of `-23.5` feet. </p> <p>What was the average rate of change in the elevation per hour?</p>

<p>Nathan opened an account with `$100`. He deposited `$20` from his pocket money weekly for the next `2 1/2` weeks. Thereafter, he spent `$60` to commute to his college weekly for the following `3` weeks.</p><p>a. What was his account balance after `2 1/2` weeks?</p><p>b. What was her account balance after the following `3` weeks?</p><p>Round to the nearest hundredth if needed.</p>