Subtraction As An Unknown-Addend Problem
Elementary School Math · Flashcards · Application
ELEMENTARY SCHOOL MATH · FLASHCARDS
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QUESTION
What is the missing number
x
x
x
in
4
+
x
=
11
4+x=11
4
+
x
=
11
(so
11
−
4
=
x
11-4=x
11
−
4
=
x
)?
QUESTION
What is the missing number
x
x
x
in
3
+
x
=
15
3+x=15
3
+
x
=
15
(so
15
−
3
=
x
15-3=x
15
−
3
=
x
)?
QUESTION
What is the missing number
x
x
x
in
5
+
x
=
9
5+x=9
5
+
x
=
9
(so
9
−
5
=
x
9-5=x
9
−
5
=
x
)?
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ANSWER
4
4
4
. Find what number added to
5
5
5
makes
9
9
9
.
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