1. +3-square =+6 6 +100-square =+9 2. -10cdot square =-16 7 -19-square =-14 3 +21-square =+11 8 -17-square =-20 4 +12-square =+21 9. +23-square =+13 5 -54-square =-50 10. +4-square =+7

1. $+3-\square =+6$<br /> - To find the value of the square, we need to solve the equation $+3-\square =+6$.<br /> - Subtracting 3 from both sides of the equation, we get $-\square =+6-3$.<br /> - Simplifying, we have $-\square =+3$.<br /> - Dividing both sides of the equation by -1, we get $\square =-3$.<br /><br />2. $-10\cdot \square =-16$<br /> - To find the value of the square, we need to solve the equation $-10\cdot \square =-16$.<br /> - Dividing both sides of the equation by -10, we get $\square =\frac{-16}{-10}$.<br /> - Simplifying, we have $\square =\frac{8}{5}$.<br /><br />3. $+21-\square =+11$<br /> - To find the value of the square, we need to solve the equation $+21-\square =+11$.<br /> - Subtracting 21 from both sides of the equation, we get $-\square =+11-21$.<br /> - Simplifying, we have $-\square =-10$.<br /> - Dividing both sides of the equation by -1, we get $\square =10$.<br /><br />4. $+12-\square =+21$<br /> - To find the value of the square, we need to solve the equation $+12-\square =+21$.<br /> - Subtracting 12 from both sides of the equation, we get $-\square =+21-12$.<br /> - Simplifying, we have $-\square =+9$.<br /> - Dividing both sides of the equation by -1, we get $\square =-9$.<br /><br />5. $-54-\square =-50$<br /> - To find the value of the square, we need to solve the equation $-54-\square =-50$.<br /> - Subtracting -54 from both sides of the equation, we get $-\square =-50-(-54)$.<br /> - Simplifying, we have $-\square =+4$.<br /> - Dividing both sides of the equation by -1, we get $\square =-4$.<br /><br />6. $+100-\square =+9$<br /> - To find the value of the square, we need to solve the equation $+100-\square =+9$.<br /> - Subtracting 100 from both sides of the equation, we get $-\square =+9-100$.<br /> - Simplifying, we have $-\square =-91$.<br /> - Dividing both sides of the equation by -1, we get $\square =91$.<br /><br />7. $-19-\square =-14$<br /> - To find the value of the square, we need to solve the equation $-19-\square =-14$.<br /> - Subtracting -19 from both sides of the equation, we get $-\square =-14-(-19)$.<br /> - Simplifying, we have $-\square =+5$.<br /> - Dividing both sides of the equation by -1, we get $\square =-5$.<br /><br />8. $-17-\square =-20$<br /> - To find the value of the square, we need to solve the equation $-17-\square =-20$.<br /> - Subtracting -17 from both sides of the equation, we get $-\square =-20-(-17)$.<br /> - Simplifying, we have $-\square =-3$.<br /> - Dividing both sides of the equation by -1, we get $\square =3$.<br /><br />9. $+23-\square =+13$<br /> - To find the value of the square, we need to solve the equation $+23-\square =+13$.<br /> - Subtracting 23 from both sides of the equation, we get $-\square =+13-23$.<br /> - Simplifying, we have $-\square =-10$.<br /> - Dividing both sides of the equation by -1, we get $\square =10$.<br /><br />10. $+4-\square =+7$<br /> - To find the value of the square, we need to solve the equation $+4-\square =+7$.<br /> - Subtracting 4 from both sides of the equation, we get $-\square =+7-4$.<br /> - Simplifying, we have $-\square =+3$.<br /> - Dividing both sides of the equation by -1, we get $\square =-3$.