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Elementary School Math · Flashcards · Application
ELEMENTARY SCHOOL MATH · FLASHCARDS
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QUESTION
What is the sum of
57
+
20
57 + 20
57
+
20
?
QUESTION
What is the sum of
65
+
20
65 + 20
65
+
20
?
QUESTION
What is the sum of
29
+
10
29 + 10
29
+
10
?
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ANSWER
39
39
39
. Add tens:
20
+
10
=
30
20 + 10 = 30
20
+
10
=
30
, add ones:
9
9
9
, so
30
+
9
=
39
30 + 9 = 39
30
+
9
=
39
.
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