SOLUTION: multiply -4*(-5)*(-4)*(-7)

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Question 269160: multiply -4*(-5)*(-4)*(-7)
Found 2 solutions by persian52, JBarnum:
Answer by persian52(161) About Me  (Show Source):
You can put this solution on YOUR website!
Here's a step by step multiplying
-4*(-5)*(-4)*(-7)
Multiply all the factors separated by a * in -4*(-5)*(-4)*(-7).
-4(-5)(-4)(-7)
Multiply -5 by -4 to get 20.
-4(20)(-7)
Multiply 20 by -7 to get -140.
-4(-140)
Multiply -4 by each term inside the parentheses.
Answer: 560
☺

Answer by JBarnum(2146) About Me  (Show Source):
You can put this solution on YOUR website!
-4%2A%28-5%29%2A%28-4%29%2A%28-7%29
to make this easy count how many negative"-" signs you have in the multiplication problem. Odd amount(1,3,5,7,9...) will always give u a negative number and and even amount (2,4,6,8...)will always give u a possitive number.
so from the problem there are 4 negative signs so you know the answer will be possitive.
so then u can rewrite the problem as 4%2A5%2A4%2A7
now simply multiply in order
4%2A5=20
20%2A4=80
80%2A7=560
so 560 is the answer