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Apply the inverse operations in reverse order, with the inverse of addition (subtraction) first, and then the inverse of multiplication (division) second. \begin{aligned} 5 y+6 & =21 \\\\ -6 & \;\; -6 \\\\ 5 y &=15 \\\\ \div \, 5 & \;\; \div 5 \\\\ y & =3 \end{aligned}
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Standard 7.NS.A.2b - Practice solving multiplicative inverses. Included Skills: Understand that integers can be divided, provided that the divisor is not zero, and every quotient of integers (with non-zero divisor) is a rational number.
Common Core Connection for Grades 1 and 2. Apply properties of operations as strategies to add and subtract. Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Add within 100, including adding a two-digit number and a one-digit number.
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There is also a property called multiplicative inverse. In multiplicative inverse, we multiply a number by a certain fraction value \((\dfrac{p}{q})\) to get 1 as a final result. For example, \(8\times\dfrac{1}{8} = 1\) \(\dfrac{1}{8}\) is a multiplicative inverse of \(8\) Note: Multiplicative inverse is not valid for zero. For example, \(8 ...
