Page 143 - NUMINO TB_1B
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038_G1U30_G2U6˙—» ¿º 2011.3.22 5:14 PM ˘ ` 132 PDF_In 2540DPI 150LPI T
Activity 2 Subtract 2-Digit Numbers
1 Find the difference of 2-digit numbers.
42 - 21 = ? Subtract the ones. Subtract the tens.
Subtract the tens ones tens ones
ones.
42 42
Then subtract -2 1 -2 1
the tens.
1
a6 3 b9 7 c 88
-4 1 -5 3 -4 3
d7 9 e4 8 f 58
-4 6 -2 7 -2 4
132
Activity 2 Subtract 2-Digit Numbers
1 Find the difference of 2-digit numbers.
42 - 21 = ? Subtract the ones. Subtract the tens.
Subtract the tens ones tens ones
ones.
42 42
Then subtract -2 1 -2 1
the tens.
1
a6 3 b9 7 c 88
-4 1 -5 3 -4 3
d7 9 e4 8 f 58
-4 6 -2 7 -2 4
132
