CTET PAPER II 2018 · PYQ · Pedagogy of Mathematics · medium
After teaching the concept of multiplication to her class, a teacher asked her children to multiply 48 by 4. One of her students solved it orally as "To multiply 48 by 4, we first add 48 to 48, which makes 96 and then add another 96 to reach 192. So, the answer is 192". What can you say about his/her strategy of multiplication?
A.The child used a wrong method to multiply. He/She has to use the place value algorithm to multiply the numbers.
B.He/She has not understood the concept of multiplication.
C.The given problem is a multiplication problem and not addition problem.
D.He/She understood multiplication as repeated addition.✓ Correct
Explanation
The student demonstrated understanding of multiplication as repeated addition, which is a foundational concept of multiplication. Multiplying 48 by 4 means adding 48 four times: 48 + 48 + 48 + 48 = 192. The student's mental strategy of doubling (48 + 48 = 96) and then doubling again (96 + 96 = 192) shows good conceptual understanding and number sense, not a wrong method.
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