John, a child subtracted few numbers as shown below:
370 - 210 = 160
870 - 353 = 520
590 - 230 = 360
75 - 40 = 30
Which one of the following statements gives an idea about the child’s learning of subtraction?
1
John doesn't knows how to subtract zero from zero and has no idea of subtraction of two-digit numbers.
2
John is not good at substracting numbers and it can be rectified by diagnostic and remedial teaching.
3
John makes a mistake only when the concepts of zero and a number come together in subtraction.
4
John doesn't makes a mistake when the question involves subtraction of zero from a number or of a number from zero.