Mathematics · Mathematics Pedagogy
Hamida wrote the following problems on the board and asked the students to write the answers: 21 ÷ 7 = 2.1 ÷ 0.7 = 0.21 ÷ 0.07 = 0.021 ÷ 0.007 = Through this set of questions, she wants the students to observe that:
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- 1if both the divisor and the dividend are decreased by a power of 10, the quotient is also decreased by the power of 10.
- 2if both the dividend and the divisor are increased or decreased by a power of 10, the quotient remains the same.✓
- 3as one divisor is decreased by 10 and the other is increased by a power of 10, the product remains the same.
- 4as one factor is divided by 10 and the other is multiplied by 10, the product remains the same.
Correct answer
if both the dividend and the divisor are increased or decreased by a power of 10, the quotient remains the same.
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