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The difference is 138. To check, we verify that the difference + the subtrahend = the original minuend:
138
+6 9
207
(You may have noticed that the carrying you do in the addition check simply reverses the borrowing
done in the original subtraction!)
1.2.5 Exercises
Find the differences, borrowing where necessary. Check that the difference + the subtrahend = the
minuend.
1.
94
− 37
2.
275
− 181
3.
350
− 76
4.
500
− 191
5.
600
− 199
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