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035_G1U27_G2U3˙—» ¿º 2011.3.22 5:4 PM ˘ ` 100 PDF_In 2540DPI 150LPI T
Activity 1 Add Tens
1 Add tens and ones.
20 + 5 = ? Add the ones. Add the tens.
2 tens and 5 tens ones tens ones
ones make 25.
20 25
+5 +0
25 25
a 40 + 8 = 48 b 30 + 7 =
d 2 + 50 =
c 5 + 80 =
e 20 f 60 g 4
+9 +5 0
+7
100
Activity 1 Add Tens
1 Add tens and ones.
20 + 5 = ? Add the ones. Add the tens.
2 tens and 5 tens ones tens ones
ones make 25.
20 25
+5 +0
25 25
a 40 + 8 = 48 b 30 + 7 =
d 2 + 50 =
c 5 + 80 =
e 20 f 60 g 4
+9 +5 0
+7
100
