$$4\times0=$$  

(a)  

$$8\times0=$$  

(a)  

$$7\times1=$$  

(a)  

$$1\times2=$$  

(a)  

$$1\times5=$$  

(a)  

  $$3\times1=$$  

(a)  

$$4\times1=$$  

(a)  

$$8\times1=$$  

(a)  

$$9\times1=$$  

(a)  

$$6\times0=$$  

(a)  

$$1\times6=$$  

(a)  

$$99\times0=$$  

(a)  

$$425\times1=$$  

(a)  

$$0\times1\ 000\ 000\ 000=$$  

(a)