$$ 28 $$ Regroup: \(4\) becomes \(3\), \(5\) becomes \(15\). Then \(15-7=8\), and \(3-1=2\).
$$ 63 - 29 = ? $$
$$ 34 $$ (Regroup: \(6\) becomes \(5\), \(3\) becomes \(13\). Then \(13-9=4\), and \(5-2=3\)).
$$ 81 - 34 = ? $$
$$ 47 $$ (Regroup: \(8\) becomes \(7\), \(1\) becomes \(11\). Then \(11-4=7\), and \(7-3=4\)).
$$ 50 - 22 = ? $$
$$ 28 $$ (Regroup: \(5\) becomes \(4\), \(0\) becomes \(10\). Then \(10-2=8\), and \(4-2=2\)).
$$ 72 - 48 = ? $$
$$ 24 $$ (Regroup: \(7\) becomes \(6\), \(2\) becomes \(12\). Then \(12-8=4\), and \(6-4=2\)).
$$ 94 - 85 = ? $$
$$ 9 $$ (Regroup: \(9\) becomes \(8\), \(4\) becomes \(14\). Then \(14-5=9\), and \(8-8=0\)).
$$ 36 - 19 = ? $$
$$ 17 $$
$$ 25 - 16 = ? $$
$$ 9 $$
$$ 88 - 59 = ? $$
$$ 29 $$
$$ 53 - 35 = ? $$
$$ 18 $$
$$ 70 - 11 = ? $$
$$ 59 $$
$$ 61 - 52 = ? $$
$$ 9 $$
$$ 43 - 27 = ? $$
$$ 16 $$
$$ 92 - 63 = ? $$
$$ 29 $$
What is a good way to check your subtraction answer?
Use addition! Add your answer to the bottom number you subtracted. The sum should equal the top number. (Example: For \(45 - 17 = 28\), check that \(28 + 17 = 45\)).
