Problem: Write an article based on this summary: Open a PDF document in Adobe Reader. Click on the highlighter tool. Position the cursor at the beginning of the text you want to highlight. Click and hold, then drag the cursor across the text. Release the click when you are done. Click on File in the menu bar and Save in the drop-down menu.

Answer: Do so by opening the red Adobe Reader app with the stylized, white A icon. Then click on File in the menu bar at the top of the screen, click on Open..., select the PDF document you want to type on and click on Open. If you don't already have Adobe Reader, it's available for free from get.adobe.com/reader and can be used with Windows, Mac, and Android operating systems. It's the marker icon on the right side of the toolbar at the top of the window.   The text is now highlighted. Doing so saves your highlighting.


Problem: Write an article based on this summary: Preheat the welding gun for at least 2 minutes. Secure the plastic together by tack welding the ends. Trim the end of a welding rod with angle cutting pliers. Insert a welding rod into a speed nozzle on a welding gun. Move the tip of the welding gun slowly over the plastic for a speed weld. Swing the welding gun back and forth if you’re doing a pendulum weld.

Answer: Every type of plastic melts at a different temperature, so setting your welding gun up correctly is important. The temperature you need will be somewhere between 200 and 300 °C (392 and 572 °F). Anything beyond that range either burns the plastic or doesn’t melt it enough.  For example, set the welding gun to 300 °C (572 °F) when working on propylene and polyurethane. Adjust the heat setting to about 275 °C (527 °F) to work on PVC. Set the heat to about 265 °C (509 °F) for polyethylene. Before you start the actual weld, pin loose pieces of plastic together by melting the ends of the joint. Fit a tack welding nozzle on your welding gun, then apply a little bit of heat. Wait for the plastic to begin melting, joining the pieces of plastic together. This will keep the plastic from moving as you complete the weld.  A tack welding nozzle looks like a tube with a fin on the end. Press the fin against the plastic to heat it and melt it together. All you need to do is melt the plastic a little to ensure it can’t come apart. If you need to, tack weld spots every 1 ft (0.30 m) along the joint for additional security. Trimming a rod is very simple. Hold the pliers diagonally toward the end of the rod. Then, snip it to hone the rod to a point. If you don’t have pliers, use a trimming knife to scrape the rod to a point.  By giving the rod a pointed end, you increase the chances of getting a smooth, steady weld without a big bubble of plastic where you start. You can let the welding gun cool off before changing nozzles and inserting the welding rod. However, remember to let the gun heat up again before starting the weld. A speed nozzle has an opening to hold the welding rod as you melt it onto the joint. If one didn’t come with your heat gun, you can buy one separately. After fitting the nozzle on your plastic welding heat gun, feed the rod into the second opening on top. Put the clipped end in first so you can use it when starting the weld.  Make sure you don’t touch the tack nozzle if it is still hot. Either wait for the nozzle to cool or swap the nozzles carefully with a pair of pliers. With a speed nozzle, you will need to feed the rod into the opening while you weld. You could also hold the rod horizontally over the joint and melt it with a technique called pendulum welding, where you sweep the gun or torch back and forth. It takes a little longer but is great for tight spots. Start at the top of the crack or area you wish to join. Hold the gun downward at about a 45-degree angle, touching the edge of the nozzle to the plastic. Then, heat the plastic until you see it beginning to melt. As you push the welding torch along the joint, feed the welding rod into it with your free hand.  The key to success with welding is consistency. If you move as a deliberate pace, you can melt the plastic and welding rod just enough to bind them without burning them. If you notice the plastic burning or changing colors, move the torch at a faster pace. Don’t let it linger on the plastic or else you will end up applying too much heat. Hold the nozzle about 2.54 cm (1.00 in) above the crack, tilting the gun at a 45-degree angle. Then, position the welding rod at a 45-degree angle from the opposite side. As you hold the rod in place, sweep the nozzle back and forth 3 or 4 times to melt it. Keep doing this as you move down the plastic to complete the weld.  Pendulum welding is useful if you don’t have a plastic heating gun with a speed nozzle. You can do it with a basic propane torch. This is also an effective way to fill a tight joint you can’t easily reach with a speed nozzle. This part is a little trickier than with speed welds since you have to control both the torch and the welding rod at the same time. Move the torch constantly to prevent the plastic from burning. Swing it back and forth across the joint at a consistent pace to lightly heat and melt the plastic.


Problem: Write an article based on this summary: Find the first digit of the answer. Multiply that digit by the divisor. Subtract to find what's left over. Bring down the next digit. Try to fit the divisor into the new number. Repeat the steps above to find the next number. Continue until you reach the end of the answer line. Add a decimal to extend the dividend if necessary. Repeat the same steps to find the next digit.

Answer:
Start solving this just as you would normally, by comparing the divisor to the first digit of the dividend. Calculate the number of times the divisor goes into this digit, then write this number above that digit.  Example: We're trying to fit 12 into 30. Compare 12 to the first digit of the divisor, 3. Since 12 is larger than 3, it goes into it 0 times. Write 0 above the 3, on the answer line. Write the product (the answer to the multiplication problem) down below the dividend. Write it directly below the first digit of the dividend, since this is the digit you just looked at.  Example: Since 0 x 12 = 0, write 0 underneath the 3. Subtract the product you just found from the digit directly above it. Write the answer on a new line below.  Example: 3 - 0 = 3, so write 3 directly below the 0. Bring the next digit of the dividend down next to the number you just wrote.  Example: Our dividend is 30. We've already looked at the 3, so the next digit to bring down is 0. Bring this down next to your 3 to make 30. Now repeat the first step of this section to find the second digit of your answer. This time, compare the divisor to the number you just wrote down on the lowest line.   Example:' How many times does 12 fit into 30? The closest we can get is 2, since 12 x 2 = 24. Write 2 in the second spot of the answer line. If you're not sure what the answer is, try some multiplication problems until you find the largest answer that fits. For example, if it seems like 3 is about write, multiply out 12 x 3 and you'll get 36. This is too big, since we're trying to fit within 30. Try the next one down, 12 x 2 = 24. This does fit, so 2 is the correct answer. This is the same long division process used above, and for any long division problem:  Multiply the new digit on your answer line by the divisor: 2 x 12  = 24. Write the product on a new line below your dividend: Write 24 directly underneath 30. Subtract the lowest line from the one above it: 30 - 24 = 6, so write 6 on a new line underneath. If there's still another digit left in your dividend, bring it down and continue solving the problem the same way. If you've reached the end of the answer line, go to the next step.  Example: We just wrote 2 at the end of the answer line. Go to the next step. If the numbers divided evenly, your last subtraction problem has "0" as the answer. That means you're done, and you have a whole number as the answer to your problem. But if you've reached the end of the answer line and there's still something left to divide, you'll need to extend the dividend by adding a decimal point followed by a 0. Remember, this does not change the value of the number.  Example: We're at the end of the answer line but the answer to our last subtraction problem is "6." Extend the "30" under the long division symbol by adding ".0" to the end. Write a decimal point at the same spot on the answer line as well, but don't write anything after it yet. The only difference here is that you must bring the decimal point up to the same spot on the answer line. Once you've done that, finding the remaining digits of the answer is exactly the same.  Example: Bring down the new 0 down to the last line to make "60." Since 12 goes into 60 exactly 5 times, write 5 as the last digit on our answer line. Don't forget that we put a decimal on our answer line, so 2.5 is the final answer to our problem.