Final answer:
The number 1.35 rounded to the nearest tenth, according to the rounding rule of thumb, is 1.4 because the digit after the tenths place is 5, which indicates that we should round up.
Step-by-step explanation:
When applying the rounding rule of thumb to the number 1.35, we must look at the number immediately following the decimal place to which we are rounding. Since we are rounding to the nearest tenth, we look at the hundredths place. In 1.35, the hundredths place is '5'. According to the rules of rounding, if the largest digit dropped is 4 or less than 4, it is simply dropped. However, if it is 5 or greater, we round up. Therefore, the rounded value of 1.35 to the nearest tenth is 1.4.