Math topics
Math a-z
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German
Math topics
Math a-z
News
German
×
Integers
»
At the start of the page a
star with integers
was created.
Task:
Complete the
number star
.
Find the
fourth summand
, so that
the
the sum
of the four integers
is in the
center of the star
.
Pay attention to calculation advantages!
Click on
check
to check your answer.
Click on
new
to create a new problem.
Can you top
399 points
?
Number star -Profi-
for
addition of integers
What is the missing summand?
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Addition - Help
- Rule for same signs
((-3)) + ((-5))
=
-8
((+3)) + ((+5))
=
+8
Add the absolute values of the numbers.
The result gets the common sign.
- Rule for different signs
((-8)) + ((+5))
=
-3
((-6)) + ((+9))
=
+3
Subtract the absolute values of the numbers.
The result gets the sign of the larger absolute value.