Respuesta :
Answer:
Yes, Rob can use 2 × 5 for multiplication of 4 × 5.
Step-by-step explanation:
We are given the following information in the question:
Rob can use 2 × 5 for multiplication of 4 × 5.
It can be used in the following manner:
[tex]4\times 5\\= (2\times 2)\times 5\\\text{By associative property of multiplication}\\= 2\times (2\times 5)\\= 2\times 10\\=20\\=4\times 5[/tex]
Hence, Rob can do the multiplication in this way.
