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036_G1U28_G2U4˙—» ¿º 2011.3.22 5:8 PM ˘ ` 110 PDF_In 2540DPI 150LPI T
Activity 1 Add the Tens
1 Add the tens.
27 + 30 = ? Add the ones. Add the tens.
2 tens 7 ones tens ones tens ones
and 3 tens are
27 27
57. +3 0 +3 0
7
a 32 + 10 = 42 b 17 + 30 =
d 30 + 11 =
c 20 + 29 =
e 18 f 59 g 45
+7 0 +3 0 +3 0
110
Activity 1 Add the Tens
1 Add the tens.
27 + 30 = ? Add the ones. Add the tens.
2 tens 7 ones tens ones tens ones
and 3 tens are
27 27
57. +3 0 +3 0
7
a 32 + 10 = 42 b 17 + 30 =
d 30 + 11 =
c 20 + 29 =
e 18 f 59 g 45
+7 0 +3 0 +3 0
110
