Question

1. 78 + 195 + 692 =13. 675 + 834 + 297 =14. 965 + 1,055 + 2,430 =15. 728 + 692 + 111 + 4,376 =16. 59 + 77 + 461 + 7,954 =17. 794 + 1,429 + 3,680 + 5,291 =a 12. 965 13. 1,806 14. 4,450 15. 5,907 16. 8,515 17. 11,194b 12. 965 13. 1,816 14. 4,460 15. 5,907 16. 8,551 17. 11,194c 12. 965 13. 1,816 14. 4,455 15. 5,907 16. 8,515 17. 11,194d 12. 965 13. 1,806 14. 4,450 15. 5,907 16. 8,551 17. 11,194

Explanation:

for Question 12:

Step1: Add 78 and 195

$78 + 195 = 273$

Step2: Add the result to 692

$273 + 692 = 965$

for Question 13:

Step1: Add 675 and 834

$675 + 834 = 1509$

Step2: Add the result to 297

$1509 + 297 = 1806$ (Wait, no, 1509+297: 1509+300=1809, minus 3 is 1806? Wait, no, 675+834=1509, 1509+297: 1509+200=1709, 1709+97=1806? Wait, but let's recalculate: 675+834=1509, 1509+297. 1509+297: 1500+200=1700, 9+97=106, 1700+106=1806? Wait, but option b and c have 1816. Wait, maybe I made a mistake. Let's recalculate 675+834+297. 675+834=1509, 1509+297. 297=300-3, so 1509+300=1809, 1809-3=1806. Wait, but option b has 1816. Wait, maybe the problem is 675+834+297. Wait, 675+834=1509, 1509+297: 1509+297. Let's do 675+297 first: 675+297=972, then 972+834=1806. So question 13 is 1806.

for Question 14:

Step1: Add 965 and 1055

$965 + 1055 = 2020$

Step2: Add the result to 2430

$2020 + 2430 = 4450$

for Question 15:

Step1: Add 728 and 692

$728 + 692 = 1420$

Step2: Add 111 to the result

$1420 + 111 = 1531$

Step3: Add 4376 to the result

$1531 + 4376 = 5907$

Answer:

d. 12. 965 13. 1,806 14. 4,450 15. 5,907 16. 8,551 17. 11,194