Answer:
to estimate the sum you round to the closest number like 38 is closest to 40 so you just say you total is $40.00
difference is when say you have 30 dollars and you spend 10 the difference is 10 dollars
I can’t see anything but a black paper
9•27+2•31-28= ? Is that what you are asking?
Answer:
3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679
