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037_G1U29_G2U5˙—» ¿º 2011.3.22 5:9 PM ˘ ` 122 PDF_In 2540DPI 150LPI T
Activity 2 Subtract the Ones
1 Find the difference. Subtract the ones. Subtract the tens.
28 - 7 = ?
Just like the tens ones tens ones
addition,
28 28
subtract the -7 -7
ones first and
then subtract 1
tens.
a 25 - 2 = 23 b 19 - 4 =
c 86 - 3 = d 47 - 6 =
e 64 f5 9 g 38
-2 - 7 -6
122
Activity 2 Subtract the Ones
1 Find the difference. Subtract the ones. Subtract the tens.
28 - 7 = ?
Just like the tens ones tens ones
addition,
28 28
subtract the -7 -7
ones first and
then subtract 1
tens.
a 25 - 2 = 23 b 19 - 4 =
c 86 - 3 = d 47 - 6 =
e 64 f5 9 g 38
-2 - 7 -6
122
