- ++ -3 -2 -1 0 1 2 2) Which addition equation matches the number line? 1 +(-2) = 3 2 1 3 2 + 3 ( 2 3 2 1 3 2 +(-2) = 2 1 + 3 1
3 2 3 3 
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For the sake of example, let's multiply the two numbers 
and 
together. Altogether, we have:
Rearranging the expression, we can group the exponents and coefficients together:
Multiplying each out, we notice that since
and 
have the same base (10), multiplying them has the effect of adding their exponents, which leaves us with:
The takeaway here is that multiplying two numbers in scientific notation together has the effect of multiplying its coefficients and <em>adding</em> its exponents.
Rearranging the expression, we can group the exponents and coefficients together:
Multiplying each out, we notice that since
The takeaway here is that multiplying two numbers in scientific notation together has the effect of multiplying its coefficients and <em>adding</em> its exponents.