16 A very common error observed in addition of linear expression is 5y +3 = 8y. This type of error is termed as1. clerical error2. conceptual error3. procedural error4. careless error
15 A class was asked to round off 342, 718 and 315 to the nearest ten. One of the students' answers was 340, 710, 310. What type of error is it?1. wrong algorithm2. regrouping error3. basic fact error4. incorrect operation