### Home > CCAA8 > Chapter 2 Unit 2 > Lesson CCA: 2.3.1 > Problem2-83

2-83.

Copy and complete each of the Diamond Problems below. The pattern used in the Diamond Problems is shown at right.

1. −1 + ? = 10

1. $\frac{2}{3}\times y =1$

$\frac{1}{\frac{2}{3}}=x+y$