$$8-(+2)=$$  

(a)  

$$19-(-6)$$  

(a)  

$$-5-(+9)$$  

(a)  

  $$-5\times\left(-7\right)$$  

(a)  

$$-60$$   $$\div$$   $$-5$$  

(a)  

$$-12-20\ \div\ \left(3-8\right)$$  

(a)  

$$6.72\ \div\left(-7.54+3.34\right)$$  

(a)  

$$\left(42.6+17.4\right)\div\left(-1.2\right)\ +2.25\times8$$  

(a)