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132_G3U14_WB_CA_˙—» ¿º 2011.4.5 7:1 PM ˘ ` 8 PDF_In 2540DPI 150LPI T
132-B4-2
2. Solve the addition or subtraction problem without using a mirror.
Example
+
a.
b.
c.
+
132-B4-2
2. Solve the addition or subtraction problem without using a mirror.
Example
+
a.
b.
c.
+
