We included **HMH Into Math Grade 7 Answer Key**** PDF** **Module 3 Understand Addition and Subtraction of Rational Numbers **to make students experts in learning maths.

## HMH Into Math Grade 7 Module 3 Answer Key Understand Addition and Subtraction of Rational Numbers

**Film Director**

Michelle Dougherty and Daniel Hinerfeld are film directors. In 2016, they directed and produced Sonic Sea, a film about the negative impact of ocean noise on whales and other marine life. In 2017, Sonic Sea won two Emmy awards, including Outstanding Nature Documentary.

**STEM Task:**

Scientists use an underwater robot to collect specimens from five sea shelves located below the oceanâ€™s surface. The shelves are located at depths of 82.25 meters, 106 meters, 79.8 meters, 131.04 meters, and 90.7 meters. Order these depths from shallowest to deepest. What is the vertical distance from the shallowest shelf to the deepest shelf? Explain.

Answer:

79.8 meters, 82.25 meters, 90.7 meters,106 meters and 131.04 meters, The shallowest shelf to the deepest shelf is 51.24 meters,

Explanation:

Given scientists use an underwater robot to collect specimens from five sea shelves located below the oceanâ€™s surface. The shelves are located at depths of 82.25 meters, 106 meters, 79.8 meters, 131.04 meters, and 90.7 meters. Ordered these depths from shallowest to deepest as 79.8 meters < 82.25 meters < 90.7 meters <106 meters < 131.04 meters so it is 79.8 meters, 82.25 meters, 90.7 meters,106 meters and 131.04 meters,

The vertical distance from the shallowest shelf to the deepest shelf is 131.04 – 79.8 = 51.24 meters.

**Learning Mindset**

**Strategic Help-Seeking Identifies Need for Help**

Strategic help-seeking is more than just asking for help with a task. It means recognizing when you need help and knowing where to find it. Strategic help-seekers look for help that promotes their learning and understanding, not just for help that gives them the answer. Here are some ideas to think about when it comes to getting help.

- Do you need help? Avoid the habit of always asking for help right awayâ€”giving yourself a chance to struggle with a task is a great way to learn. On the other hand, if you’ve been struggling for some time and cannot move forward, that is a sign you may need some help.
- Where can you find help? Think about people, tools, references, and other resources.
- What help do you need? You have a better chance of getting the help you need if you can clearly communicate what you need assistance with. It may be useful to write down a question or sentence about what is challenging you or holding you back. Be as specific as you can.

**Reflect**

Question.

How do you know when you need help with a task?

Answer:

Struggling for some time and cannot move forward,

Explanation:

If I’ve been struggling for some time and cannot move forward, that is a sign that may need some help.

Question.

What resources did you use to help you understand and complete the STEM Task?

Answer:

People, tools, references, and other resources,

Clearly communicate what I need assistance with. It may be useful to write down a question or sentence about what is challenging about or holding back,

Explanation:

People, tools, references, and other resources can help, To have a better chance of getting the help I need if I can clearly communicate what I need assistance with. It may be useful to write down a question or sentence about what is challenging or holding back.

**Whatâ€™s the Pattern?**

Five explorers are each at different elevations in a cave. The rational numbers given show their elevations in kilometers. The signs of the numbers indicate the elevation above (+) or below (â€”) ground level.

Plot each rational number on the number line next to it.

Answer:

Explanation:

Plotted each rational number on the number line next to it above.

**Turn and Talk**

What pattern is formed by the five elevations? Explain your reasoning.

Answer:

Both negative and positive,

Explanation:

The rational numbers given shown their elevations in kilometers. The signs of the numbers indicate the elevation above (+) or below (â€”) ground level. As we have pattern both positive and negative it means that five explorers at different elevation negative means the explorers are below ground level and if it is positive means the explorers are above ground levels.