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FOUR IN A ROW
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Choose a square and click on it. Click on the correct answer to the question in the box that appears. If you are right the square is replaced by a tick. Continue until you have won 4 in a row...
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Game: FOUR IN A ROW

Aim: To get four symbols in a row

Method:
Choose a square and click on it. Click on the correct answer to the question in the box that appears. If you are right the square is replaced by a tick. Continue until you have won 4 in a row...

Complements of number one
      
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4 IN A ROW game to practice
'Complements of number one' for 4th grade

Decimal complements: complements of 1

Decimal complements refer to the process of finding the complement of a decimal number with respect to a target number. In this topic, complements to 1, complement means the value that, when added to the given decimal number, will result in a sum of 1.

To find the decimal complement to 1, you can follow these steps:

  1. Start with the given decimal number.
  2. Subtract the decimal number from 1.
  3. The result will be the decimal complement to 1.

For example, let's say we want to find the decimal complement to 1 of the number 0.75.

1 - 0.75 = 0.25

So, the decimal complement to 1 of 0.75 is 0.25.

Another example: Let's find the decimal complement to 1 of the number 0.412.

This is not as easy as the first example because the subtraction is harder:

1 - 0.412

Of course you can use a calculator to do this, but as mental arithmetic, the easiest way is to think of the digits after the point as a separate value, in this case 412. Because there are 3 digits, we subtract it from 1000, so we get 1000 - 412 = 588

Putting the decimal point back in, we can say:

1 - 0.412 = 0.588

So, the decimal complement to 1 of 0.412 is 0.588

With our Four in a row math game you will be practicing the topic "Complements of number one" from 4th grade / Decimals / Add decimals. The math in this game consists of 16 questions that ask you to identify the missing decimal complement to 1.

Four in a row is similar to the paper game "Noughts and crosses" but we have changed it into a one-person math learning / revision game. The aim of the game is to win 4 cells in a row from a grid of 16 cells.

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The game will reinforce the math you have chosen to learn by getting you to match the question to the correct answer.

Notes

  • Do the Math lessons for your topic before playing this game
  • Wrong answers are ok, you just have to try again until you get them right
  • There is help available for all games by clicking the question mark button
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How to play 4 in a row to practice
'Complements of number one' for 4th grade

Free Math Games screenshot of 4 in a row game to learn elementary math

  1. Select "4 in a row" on the math games selection page.
  2. Take a quick look at the method text for 4 in a row.
  3. Click on PLAY to proceed, or change your topic with the CHANGE TOPIC button.
  4. On the play page you have a grid of 16 pictures (some topic picture are shown multiple times for shorter topics).
  5. Click on a picture cell.
  6. The topic question will appear along with a series of possible answers.
  7. Click the speaker icon to hear any particular answer (Speech enabled browsers only).
  8. Click the answer that corresponds to the picture question.
  9. If you are correct, the picture will be replaced by a tick - otherwise, a wrong sound will play.
  10. Continue matching picture questions to their correct answers until you have completed a line of 4 cells.
  11. The line can be diagonal as well as horizontal or vertical.
  12. 4 ticks in a row wins the game.
  13. Choose an option from the green sign, or click on games to choose a different game.
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