Fill in the box with the correct value and identify the prop-erties of real numbers used in each item. write your answer in your activity notebook or answer sheet. 1.7+(-21)=__+7
2.-5+[3+(-10)]=(-5+___)+(-10

patulong Po bukas npo deadline salamt

M= { 9, 11, 13, 15, 17, 19, 21, }
a = { 7 }
t = {  caloocan,  las piñas, makati, malabon, mandaluyong, manila, marikina, muntinlupa, navotas, parañaque, pasay, pasig, quezon city, san juan, taguig, valenzuela }
h = { 8, 9 }

s = { 4  } ~ not sure but 4 is a day in a month with four letters when spelled.
or
s = { friday } ~ if base on the calendar, friday is the 6th day of the week with six letters when spelled.