A nunber is multiplied by 2. then that product is multiplied by 5. write to explain how you know what digit is in the ones place the final product

Any number multiplied by 2 will give u an even number.

2 x 3 = 6

2 x 4 = 8

2 x 5 = 10

and any even number multiplied by 5 will end in 0

5 x 2 = 10

5 x 4 = 20

5 x 6 = 30

so the number in the ones place will be 0