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'Playing Connect Three' printed from http://nrich.maths.org/
You need to consider all the
different possible outcomes when you throw the dice.
You could get:
$^-5$ on the Yellow dice &
$^-3$ on the Red dice, or
$3$ on the Yellow dice & $^-1$
on the Red dice, or...
How many different possible outcomes are there?
You can make different totals with
If you get $3$ & $^-1$ you can make totals of $2$ or $4$ or
Yellow dice + Red dice
$3 + (^-1) = 2$
Yellow dice - Red dice
$3 - (^-1) = 4$
Red dice - Yellow dice
$^-1 - 3 = ^-4$
How many combinations are there for each throw of the dice?
How many combinations are there altogether?