Answer:
3) He made a computation error when he added 10.35+7.6
Step-by-step explanation:
Steps to add decimals:
1)Write down the numbers, one under the other, with the decimal points lined up
2) Put in zeros so the numbers have the same length
3) Then add using column addition, remembering to put the decimal point in the answer
Applying the above steps:
line the decimals up 10.35
7.6
Putting zero to get same length
10.35
7.60
Addition:
10.35
+7.60
......................
17.95
Now we can see that, there is error when he added 10.35 + 7.6
