4.06
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-- If the digit to the right of the underlined one is 4 or less, then discard everything to the right of the underlined one. -- If the digit to the right of the underlined one is 5 or more, then add ' 1 ' to the underlined digit, and discard everything to the right of it.
Depending on which number is underlined... 500,000 - 50,000 or 5
[object Object]
the value of the underlined digit of 153 is Place of 3 = unit (1), Place of 5 = 10th and Place of 1 = 100th.
The tens digit is 8 and the ones digit is 5. Rounding to the nearest ten is equal to rounding at the ones digit.When rounding, if the digit is greater than 5, round up; otherwise round off.85, so 90.