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132_G3U14_G4U14_˙—» ¿º 2011.3.22 9:9 PM ˘ ` 130 PDF_In 2540DPI 150LPI T
Activity 2 Addition and Subtraction in Mirrors
1 . Addition and subtraction of digital numbers are reflected in a mirror.
Solve the problem without using a mirror.
a.
-
- =3
b.
+=
+
c.
++ =
130
Activity 2 Addition and Subtraction in Mirrors
1 . Addition and subtraction of digital numbers are reflected in a mirror.
Solve the problem without using a mirror.
a.
-
- =3
b.
+=
+
c.
++ =
130
