Question

1. 28.4 + 73.2 + 221.88 = 11. 98.34 + 17.626 = 12. 191.34 + 58.177 + 2.03 = a 10. 323.480 11. 115.970 12. 251.550 b 10. 323 11. 116 12. 252 c 10. 323.48 11. 115.97 12. 251.55 d 10. 323.48 11. 115.966 12. 251.547

Explanation:

Problem 10: \(28.4 + 73.2 + 221.88\)

Step1: Add 28.4 and 73.2

\(28.4 + 73.2 = 101.6\)

Step2: Add the result to 221.88

\(101.6 + 221.88 = 323.48\)

Problem 11: \(98.34 + 17.626\)

Step1: Add the two decimals

\(98.34 + 17.626 = 115.966\) (Wait, no, let's check again. 98.34 is 98.340, so 98.340 + 17.626 = 115.966? Wait, no, 98.34 + 17.626: 98 + 17 = 115, 0.34 + 0.626 = 0.966, so total is 115.966? Wait, but let's do it properly:

98.34
+17.626
--------
115.966

Wait, but let's check the options. Wait, option d has 115.966. Wait, maybe I made a mistake earlier. Wait, 98.34 + 17.626:

98.34 is 98.340 (adding a zero at the end to match decimal places). Then 98.340 + 17.626:

0.340 + 0.626 = 0.966

98 + 17 = 115

So total is 115.966.

Problem 12: \(191.34 + 58.177 + 2.03\)

Step1: Add 191.34 and 58.177

\(191.34 + 58.177 = 249.517\)

Step2: Add the result to 2.03

\(249.517 + 2.03 = 251.547\)

Now let's check the options:

Problem 10: 323.48 (matches d, c)

Problem 11: 115.966 (matches d)

Problem 12: 251.547 (matches d)

So the correct option is d.

Answer:

d. 10. 323.48 11. 115.966 12. 251.547