Question

Do the following sums by breaking down numbers 36 + 21.

a) 57
b) 58
c) 59
d) 60

Answer 1

The sum of 36 and 21 is 57, which is option (a). Also provided are examples of how to report answers with the correct number of significant figures, with values adjusted accordingly for examples (a), (b), and (d).

Step-by-step explanation:

The student is asking whether the sum of 36 and 21 results in one of the options given: 57, 58, 59, or 60. To solve this, we simply need to add the two numbers directly:

36 + 21 = 57

So, the correct answer is (a) 57.

For the calculations requested with the correct number of significant figures, here are a few examples:

• (a) 62.8 x 34 is calculated as 2135.2, but with significant figures, it would be reported as 2100 (assuming significant figures from the multiplicant).
• (b) 0.147 + 0.0066 + 0.012 equals 0.1656, and with correct significant figures, it should be reported as 0.166.
• (d) 15 - 0.15 - 0.6155 equals 14.2345, and with the correct number of significant figures, it should be reported as 14.23.