Hey guys what is 1,000,000,000 - 999,999,999,999 = ?
A. -134
B. Dont Know
C. Dont Care
D. dont chose any of these cause I have NO idea
+9673 Half of D.
I don't choose any of these but I have an idea.
\(1,000,000,000 - 999,999,999,999\\ =-(999,999,999,999-1,000,000,000)\\ =-998,999,999,999\)
Step one is a way that I found in Primary 1, which is grade 1 in some countries, to do subtractions which answers are negative. So that's why I can already do negative addition, subtraction, and multiplication in Primary 1.
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