0
A quick check before we start.
Which check tests whether
47
−
19
=
28
47-19=28
47
−
19
=
28
is correct?
A
28
+
19
=
47
28+19=47
28
+
19
=
47
B
28
−
19
=
9
28-19=9
28
−
19
=
9
C
28
×
19
=
532
28\times19=532
28
×
19
=
532
D
47
+
19
=
66
47+19=66
47
+
19
=
66
E
47
−
28
=
21
47-28=21
47
−
28
=
21
Check
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