Add 305 to 483 in base 8. Write seven thousand seven hundred and eighty-seven in figures. The three angles of a triangle are x, 43, and 72 degrees. Find x. If a pupil buys 36 oranges at 50 FRS each, h

Here are the solutions to your questions: 1. We usually add using base 10. Add 305 to 483 in base 8. Assumption: The number 483 is a typo and should be 473_8, as 8 is not a valid digit in base 8. We will add 305_8 and 473_8. Step 1: Add the rightmost digits: 5_8 + 3_8 = 8_10 = 10_8. Write down 0, carry over 1. Step 2: Add the middle digits: 0_8 + 7_8 + 1_8 (carry) = 8_10 = 10_8. Write down 0, carry over 1. Step 3: Add the leftmost digits: 3_8 + 4_8 + 1_8 (carry) = 8_10 = 10_8. Write down 10. 305_8 + 473_8 = 1000_8 2. Numbers can be written in either figures or words. Write seven thousand seven hundred and eighty-seven in figures. Step 1: Identify the place values for each part of the number. Step 2: Combine the figures. 7787 3. The three angles of a triangle are x^, 43^, and 72^. Find the third angle. Step 1: The sum of angles in a triangle is 180^. x^ + 43^ + 72^ = 180^ Step 2: Combine the known angles. x^ + 115^ = 180^ Step 3: Solve for x. x^ = 180^ - 115^ x^ = 65^ 4. If a pupil buys 36 oranges at 50 FRS each, how much will he pay for all the oranges? Step 1: Multiply the number of oranges by the cost per orange. Total cost = 36 × 50 FRS Step 2: Calculate the product. Total cost = 1800 FRS 5. Write 6003 in words. Step 1: Identify the thousands and units digits. Six thousand three 6. What is the place value of 4 in 3460? Step 1: Identify the position of the digit 4. The digit 4 is in the hundreds place. Hundreds 7. What is the average of 1, 4, 5, 6 and 9? Step