Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 1 - Problem Solving and Critical Thinking - 1.1 Inductive and Deductive Reasoning - Exercise Set 1.1 - Page 14: 74

Answer

given below.

Work Step by Step

(a) The expression is\[6\times 6,66\times 66,666\times 666\]and \[6666\times 6666\]. Solve this expression by usinga calculator: \[\begin{align} & 6\times 6=36 \\ & 66\times 66=4356 \\ & 666\times 666=443,556 \\ & 6666\times 6666=44,435,556 \end{align}\] (b) A pattern in the result obtained can be identified as follows: If an additional digit 6 is attached to the number being multiplied. An additional digit of 4 is attached to the left of the result and an additional digit of 5 is placed between 3 and 6. (c) The expression is\[6\times 6,66\times 66,666\times 666\], and \[6666\times 6666\]. Solve these two-next multiplication and product expression by usinga calculator: \[\begin{align} & 6\times 6=36 \\ & 66\times 66=4356 \\ & 666\times 666=443,556 \\ & 6666\times 6666=44,435,556 \end{align}\] That is, \[66666\times 66666=4,444,355,556\] \[666666\times 666666=444,443,555,556\] Verify this result as \[\begin{align} & 66666\times 66666=4,444,355,556 \\ & 4,444,355,556=4,444,355,556 \end{align}\] And, \[\begin{align} & 666666\times 666666=444,443,555,556 \\ & 444,443,555,556=444,443,555,556 \end{align}\] Thus, the result is correct. (d) The expression is\[6\times 6,66\times 66,666\times 666\], and \[6666\times 6666\]. Solve this expression by using a calculator, \[\begin{align} & 6\times 6=36 \\ & 66\times 66=4356 \\ & 666\times 666=443,556 \\ & 6666\times 6666=44,435,556 \end{align}\] This is a inductive reasoning, it uses an observed pattern and draws a conclusion from that pattern.A pattern in the number and an additional digit of 6 is attached to the number being multiplied. An additional digit of 4 is attached to the left of the result and an additional digit of 5 is placed between 3 and 6.
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