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Direct Multiplication 193 6 8 8 –1 57 –1 2 For the fi nal step we multiply the tens digits. 6 × 8 = 48 We add the 5 that was car ...
194 Speed Math for Kids from 32, which gives us 26. Don’t forget the carry of –1, so we end up with 25. Write the 5 and carry th ...
195 = x 0 1 2 3 4 5 6 7 8 9 ( ) % < > + - = x 0 1 2 3 4 5 6 7 8 9 ( ) % < > + - = x 0 1 2 3 4 5 6 7 8 9 ( ) % < ...
196 Speed Math for Kids For instance, our methods of division apply to all division problems— they are not shortcuts applicable ...
Putting It All into Practice 197 the methods every day as you have the need and opportunity. If you have an opportunity to use o ...
198 Speed Math for Kids me implies trickery—you aren’t really doing what you appear to be doing. Also, people react with the com ...
199 AAFTERWORDFTERWORD If you would like to learn more of my methods, then I would recommend you buy my book Speed Mathematics. ...
200 Speed Math for Kids STUDENTS People equate mathematical ability with intelligence. Use the methods you have learned in this ...
Afterword 201 else. Compare your child’s performance with what he or she did in the past. Look at the improvement. Some children ...
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203 = x 0 1 2 3 4 5 6 7 8 9 ( ) % < > + - = x 0 1 2 3 4 5 6 7 8 9 ( ) % < > + - = x 0 1 2 3 4 5 6 7 8 9 ( ) % < ...
204 Appendix A If you were asked to subtract 378 from 613, you would again write the problem down as usual. Th en you could fi n ...
Using the Methods in the Classroom 205 Had you found you had made a mistake, you could cast out nines to fi nd where you made it ...
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207 + - = x 0 1 2 3 4 5 6 7 8 9 ( ) % < > + - = x 0 1 2 3 4 5 6 7 8 9 ( ) % < > + - = x 0 1 2 3 4 5 6 7 8 9 ( ) % &l ...
208 Appendix B You don’t need to recite the whole procedure. You wouldn’t say, “Fourteen plus fi ve is one hundred and ninety. N ...
209 + - = x 0 1 2 3 4 5 6 7 8 9 ( ) % < > + - = x 0 1 2 3 4 5 6 7 8 9 ( ) % < > + - = x 0 1 2 3 4 5 6 7 8 9 ( ) % &l ...
210 Appendix C one more 3 makes 13 threes. If you know 12 fours are 48, just add another 4 to get 52. Th en, when you know your ...
211 = x 0 1 2 3 4 5 6 7 8 9 ( ) % < > + - = x 0 1 2 3 4 5 6 7 8 9 ( ) % < > + - = x 0 1 2 3 4 5 6 7 8 9 ( ) % < ...
212 Appendix D For instance, let’s check if 15,476 is divisible by four. Th e tens digit, 7, is odd, so we carry 1 to the units ...
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