Question

Simplify 907×2907×5​.

A) 2.5
B) 5
C) 0.5
D) 1

Answer 1

To simplify the expression 907×2907×5, notice that multiplying any two numbers both ending with 9 produces a result whose units digit is 9, and then, multiplying by 5 gives a number ending in 5, which simplifies to 0.5 when divided by 10.

Step-by-step explanation:

The question asks to simplify 907×2907×5. The key to simplifying this expression is to recognize that 907 and 2907 have a 9 in their ones place. Multiplying these two numbers, the ones digit of the result will also be a 9. However, when we multiply this result by 5, the ones digit will be 5 (since 9×5 is 45). Thus, any number ending in 5, when divided by 10, results in a number ending in .5. Therefore, the expression simplifies to 0.5, so the correct answer is C) 0.5.