What is the value of the underline digit 72

The value of seventy-two is basically like rounding to the nearest tenth. The guy who answer first is right I'm just explaining why. So say we have 72 rounded to the nearest tenth. You always round down if the number is in the ones place is lower than 5. so if there is a number like 85, you would round up to 90. but if the number is 84, you would round down to 80. so 72 rounded down is 70, and two rounded down is 0.

The value of the 7 is 70 and the value of the 2 is 2.