● There are 21 big squares for the numbers and 15 small squares for the operation signs.
● Each big square must have a number that is the sum or difference of the numbers on the squares just below it. The small squares must carry the necessary operation signs.
● Some of the big squares and a small squares are filled with numbers and a sign. Use these as hints to fill the rest of the big squares and the small squares to complete the triangle.
Answers
Complete the triangle:
To complete the triangle with 21 big squares for numbers and 15 small squares for operation signs, we need to follow the given rules:
- Each big square must have a number that is the sum or difference of the numbers on the squares just below it. This means that each number in a big square is obtained by adding or subtracting the numbers in the squares below it.
- The small squares must carry the necessary operation signs. The operation signs (+ or -) should be placed in the small squares to indicate whether the numbers should be added or subtracted.
Given that some of the big squares and small squares are already filled with numbers and signs, we can use these as hints to fill the remaining squares. By following the rule that each number is the sum or difference of the numbers below it, we can systematically fill in the remaining big squares.
Similarly, by considering the numbers in the big squares and using the rule that each number is obtained by adding or subtracting the numbers below it, we can determine the appropriate operation signs for the small squares.
By carefully applying these rules and using the given hints, we can complete the triangle by filling in the remaining big squares with numbers and the remaining small squares with the correct operation signs.
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