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milkshakegrande101
27.09.2019 •
Mathematics
Mike watches a caterpillar climbing on a tree trunk. he writes the expression -5/8 - (-1/8 - 1/2) to show the change, in feet, of the caterpillar’s height on the tree trunk. which of the following expressions are equivalent to
-5/8 - (-1/8 - 1/2) ?
choose all that apply.
a. -5/8 + (1/8 + 1/2)
b. -5/8 + 5/8
c. -5/8 - (1/8 + 1/2)
d. -5/8 - (-1/8 + (-1/2))
e. -5/8 + (1/8 - 1/2)
f. -5/8 - 1/8 - 1/2
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Ответ:
A.![\frac{-5}{8}+(\frac{1}{8}+\frac{1}{2})](/tpl/images/0267/2242/05bb1.png)
B.![\frac{-5}{8}+(\frac{5}{8})](/tpl/images/0267/2242/7eac4.png)
D.![\frac{-5}{8}-(\frac{-1}{8}+(\frac{-1}{2}))](/tpl/images/0267/2242/65371.png)
Step-by-step explanation:
- Mike watches a caterpillar climbing on a tree trunk
- He writes the expression![\frac{-5}{8}-(\frac{-1}{8}-\frac{1}{2})](/tpl/images/0267/2242/06aa0.png)
- We need to find the equivalent expressions to this expression
A.
∵ The expression
has a
common sign negative in the bracket
∴![\frac{-5}{8}-(-)(\frac{1}{8}+\frac{1}{2})](/tpl/images/0267/2242/c60df.png)
∵ (-)(-) = (+)
∴![\frac{-5}{8}+(\frac{1}{8}+\frac{1}{2})](/tpl/images/0267/2242/05bb1.png)
∵ The expression
is
equivalent to the expression![\frac{-5}{8}-(\frac{-1}{8}-\frac{1}{2})](/tpl/images/0267/2242/06aa0.png)
B.
∵ In the expression
, lets
add the two terms in the bracket
∴ The expression =![\frac{-5}{8}-(\frac{-5}{8})](/tpl/images/0267/2242/2c201.png)
∵ (-)(-) = (+)
∴ The expression =![\frac{-5}{8}+(\frac{5}{8})](/tpl/images/0267/2242/7eac4.png)
∴ The expression
is equivalent to
the expression![\frac{-5}{8}-(\frac{-1}{8}-\frac{1}{2})](/tpl/images/0267/2242/06aa0.png)
D.
∵ In the expression
, we can
write the bracket as![(\frac{-1}{8}-\frac{1}{2})=(\frac{-1}{8}+(\frac{-1}{2}))](/tpl/images/0267/2242/2b903.png)
because (+)(-) = (-)
∴ The expression
is equivalent to
the expression![\frac{-5}{8}-(\frac{-1}{8}+(\frac{-1}{2}))](/tpl/images/0267/2242/65371.png)
* The equivalent expressions are A , B and D
Ответ:
It would be 12...
Step-by-step explanation: