三年级三位数乘以一位数上课讲义.docx
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三年级三位数乘以一位数上课讲义
123×5=
576×2=
517×7=
245×4=
621×3=
574×2=
314×6=
224×3=
540×7=
452×7=
842×2=
745×3=
341×2=
248×7=
634×2=
941×4=
912×6=
431×4=
321×6=
578×3=
218×3=
216×8=
432×1=
351×3=
218×3=
216×8=
132×1=
853×2=
168×4=
321×3=
246×5=
121×7=
968×8=
743×2=
138×7=
976×5=
100×3=
495×4=
300×5=
646×1=
300×3=
246×8=
630×2=
346×2=
110×3=
546×1=
216×9=
854×1=
303×2=
688×6=
103×3=
549×8=
106×7=
981×3=
213×2=
116×2=
342×4=
978×7=
102×6=
859×2=
871×2=
303×4=
988×3=
743×2=
316×8=
712×3=
968×2=
743×2=
576×2=
106×5=
732×3=
246×8=
219×8=
796×2=
138×9=
513×3=
691×3=
610×9=
629×6=
501×6=
549×2=
768×3=
701×8=
985×2=
701×7=
119×8=
401×9=
788×2=
651×4=
120×3=
497×3=
853×2=
200×9=
801×5=
465×2=
574×3=
123
×
1
=
200
×
1
=
521
×
1
=
342
×
1
=
124
×
2
=
201
×
3
=
523
×
3
=
344
×
3
=
125
×
3
=
202
×
5
=
525
×
5
=
346
×
5
=
126
×
4
=
203
×
7
=
527
×
7
=
348
×
7
=
127
×
5
=
204
×
9
=
529
×
9
=
350
×
9
=
128
×
6
=
205
×
2
=
531
×
2
=
352
×
2
=
129
×
7
=
206
×
4
=
533
×
4
=
354
×
4
=
130
×
8
=
207
×
8
=
535
×
8
=
356
×
8
=
131
×
9
=
208
×
1
=
537
×
1
=
358
×
1
=
132
×
1
=
209
×
3
=
539
×
3
=
360
×
3
=
133
×
2
=
210
×
5
=
541
×
5
=
362
×
5
=
134
×
3
=
211
×
7
=
543
×
7
=
364
×
7
=
135
×
4
=
212
×
9
=
545
×
9
=
366
×
9
=
136
×
5
=
213
×
2
=
547
×
2
=
368
×
2
=
137
×
6
=
214
×
4
=
549
×
4
=
370
×
4
=
138
×
7
=
215
×
8
=
551
×
8
=
372
×
8
=
139
×
8
=
216
×
1
=
553
×
1
=
374
×
1
=
140
×
9
=
217
×
3
=
555
×
3
=
376
×
3
=
141
×
1
=
218
×
5
=
557
×
5
=
378
×
5
=
142
×
2
=
219
×
7
=
559
×
7
=
380
×
7
=
143
×
3
=
220
×
9
=
561
×
9
=
382
×
9
=
144
×
4
=
221
×
2
=
563
×
2
=
384
×
2
=
145
×
5
=
222
×
4
=
565
×
4
=
386
×
4
=
146
×
6
=
223
×
8
=
567
×
8
=
388
×
8
=
147
×
7
=
224
×
1
=
569
×
1
=
390
×
1
=
148
×
8
=
225
×
3
=
571
×
3
=
392
×
3
=
149
×
9
=
226
×
5
=
573
×
5
=
394
×
5
=
150
×
1
=
227
×
7
=
575
×
7
=
396
×
7
=
151
×
2
=
228
×
9
=
577
×
9
=
398
×
9
=
152
×
3
=
229
×
2
=
579
×
2
=
400
×
2
=
153
×
4
=
230
×
4
=
581
×
4
=
402
×
4
=
154
×
5
=
231
×
8
=
583
×
8
=
404
×
8
=
155
×
6
=
232
×
1
=
585
×
1
=
406
×
1
=
156
×
7
=
233
×
3
=
587
×
3
=
408
×
3
=
157
×
8
=
234
×
5
=
589
×
5
=
410
×
5
=
158
×
9
=
235
×
7
=
591
×
7
=
412
×
7
=
159
×
1
=
236
×
9
=
593
×
9
=
414
×
9
=
160
×
2
=
237
×
2
=
595
×
2
=
416
×
2
=
161
×
3
=
238
×
4
=
597
×
4
=
418
×
4
=
162
×
4
=
239
×
8
=
599
×
8
=
420
×
8
=
163
×
5
=
240
×
1
=
601
×
1
=
422
×
1
=
164
×
6
=
241
×
3
=
603
×
3
=
424
×
3
=
165
×
7
=
242
×
3
=
605
×
3
=
426
×
3
=
166
×
8
=
243
×
5
=
607
×
5
=
428
×
5
=
167
×
9
=
244
×
7
=
609
×
7
=
430
×
7
=
168
×
1
=
245
×
9
=
611
×
9
=
432
×
9
=
169
×
2
=
246
×
2
=
613
×
2
=
434
×
2
=
170
×
3
=
247
×
4
=
615
×
4
=
436
×
4
=
171
×
4
=
248
×
8
=
617
×
8
=
438
×
8
=
172
×
5
=
249
×
1
=
619
×
1
=
440
×
1
=
173
×
6
=
250
×
3
=
621
×
3
=
442
×
3
=
174
×
7
=
251
×
3
=
623
×
3
=
444
×
3
=
175
×
8
=
252
×
5
=
625
×
5
=
446
×
5
=
176
×
9
=
253
×
7
=
627
×
7
=
448
×
7
=
177
×
1
=
254
×
9
=
629
×
9
=
450
×
9
=
178
×
2
=
255
×
2
=
631
×
2
=
452
×
2
=
179
×
3
=
256
×
4
=
633
×
4
=
454
×
4
=
180
×
4
=
257
×
8
=
635
×
8
=
456
×
8
=
181
×
5
=
258
×
1
=
637
×
1
=
458
×
1
=
182
×
6
=
259
×
3
=
639
×
3
=
460
×
3
=
183
×
7
=
260
×
3
=
641
×
3
=
462
×
3
=
184
×
8
=
261
×
5
=
643
×
5
=
464
×
5
=
185
×
9
=
262
×
7
=
645
×
7
=
466
×
7
=
186
×
1
=
263
×
9
=
647
×
9
=
468
×
9
=
187
×
2
=
264
×
2
=
649
×
2
=
470
×
2
=
188
×
3
=
265
×
4
=
651
×
4
=
472
×
4
=
189
×
4
=
266
×
8
=
653
×
8
=
474
×
8
=
190
×
5
=
267
×
1
=
655
×
1
=
476
×
1
=
191
×
6
=
268
×
3
=
657
×
3
=
478
×
3
=
192
×
7
=
269
×
3
=
659
×
3
=
480
×
3
=
193
×
8
=
270
×
5
=
661
×
5
=
482
×
5
=
194
×
9
=
271
×
7
=
663
×
7
=
484
×
7
=
195
×
1
=
272
×
9
=
665
×
9
=
486
×
9
=
196
×
2
=
273
×
2
=
667
×
2
=
488
×
2
=
197
×
3
=
274
×
4
=
669
×
4
=
490
×
4
=
198
×
4
=
275
×
8
=
671
×
8
=
492
×
8
=
199
×
5
=
276
×
1
=
673
×
1
=
494
×
1
=
200
×
6
=
277
×
3
=
675
×
3
=
496
×
3
=
201
×
7
=
278
×
3
=
677
×
3
=
498
×
3
=
202
×
8
=
279
×
5
=
679
×
5
=
500
×
5
=
203
×
9
=
280
×
7
=
681
×
7
=
502
×
7
=
204
×
1
=
281
×
9
=
683
×
9
=
504
×
9
=
205
×
2
=
282
×
2
=
685
×
2
=
506
×
2
=
206
×
3
=
283
×
4
=
687
×
4
=
508
×
4
=
207
×
4
=
284
×
8
=
689
×
8
=
510
×
8
=
208
×
5
=
285
×
1
=
691
×
1
=
512
×
1
=
209
×
6
=
286
×
3
=
693
×
3
=
514
×
3
=
210
×
7
=
287
×
3
=
695
×
3
=
516
×
3
=
211
×
8
=
288
×
5
=
697
×
5
=
518
×
5
=
212
×
9
=
289
×
7
=
699
×
7
=
520
×
7
=
213
×
1
=
290
×
9
=
701
×
9
=
522
×
9
=
214
×
2
=
291
×
2
=
703
×
2
=
524
×
2
=
215
×
3
=
292
×
4
=
705
×
4
=
526
×
4
=
216
×
4
=
293
×
8
=
707
×
8
=
528
×
8
=
217
×
5
=
294
×
1
=
709
×
1
=
530
×
1
=
218
×
6
=
295
×
3
=
711
×
3
=
532
×
3
=
219
×
7
=
296
×
3
=
713
×
3
=
534
×
3
=
220
×
8
=
297
×
5
=
715
×
5
=
536
×
5
=
221
×
9
=
298
×
7
=
717
×
7
=
538
×
7
=
222
×
1
=
299
×
9
=
719
×
9
=
540
×
9
=
223
×
2
=
300
×
2
=
721
×
2
=
542
×
2
=
224
×
3
=
301
×
4
=
723
×
4
=
544
×
4
=
225
×
4
=
302
×
8
=
725
×
8
=
546
×
8
=
226
×
5
=
303
×
1
=
727
×
1
=
548
×
1
=
227
×
6
=
304
×
3
=
729
×
3
=
550
×
3
=
228
×
7
=
305
×
3
=
731
×
3
=
552
×
3
=
229
×
8
=
306
×
5
=
733
×
5
=
554
×
5
=
230
×
9
=
307
×
7
=
735
×
7
=
556
×
7
=
231
×
1
=
308
×
9
=
737
×
9
=
558
×
9
=
232
×
2
=
309
×
2
=
739
×
2
=
560
×
2
=
233
×
3
=
310
×
4
=
741
×
4
=
562
×
4
=
234
×
4
=
311
×
8
=
743
×
8
=
564
×
8
=
235
×
5
=
312
×
1
=
745
×
1
=
566
×
1
=
236
×
6
=
313
×
3
=
747
×
3
=
568
×
3
=
237
×
7
=
314
×
3
=
749
×
3
=
570
×
3
=
238
×
8
=
315
×
5
=
751
×
5
=
572
×
5
=
239
×
9
=
316
×
7
=
753
×
7
=
574
×
7
=
240
×
1
=
317
×
9
=
755
×
9
=
576
×
9
=
241
×
2
=
318
×
2
=
757
×
2
=
578
×
2
=
242
×
3
=
319
×
4
=
759
×
4
=
580
×
4
=
243
×
4
=
320
×
8
=
761
×
8
=
582
×
8
=
244
×
5
=
321
×
1
=
763
×
1
=
584
×
1
=
245
×
6
=
322
×
3
=
765
×
3
=
586
×
3
=
246
×
7
=
323
×
3
=
767
×
3
=
588
×
3
=
247
×
8
=
324
×
5
=
769
×
5
=
590
×
5
=
248
×
9
=
325
×
7
=
771
×
7
=
592
×
7
=
249
×
1
=
326
×
9
=
773
×
9
=
594
×
9
=
250
×
2
=
327
×
2
=
775
×
2
=
596
×
2
=
251
×
3
=
328
×
4
=
777
×
4
=
598
×
4
=
252
×
4
=
329
×
8
=
779
×
8
=
600
×
8
=
253
×
5
=
330
×
1
=
781
×
1
=
602
×
1
=
254
×
6
=
331
×
3
=
783
×
3
=
604
×
3
=
255
×
7
=
332
×
3
=
785
×
3
=
606
×
3
=
256
×
8
=
333
×
5
=
787
×
5
=
608
×
5
=
257
×
9
=
334
×
7
=
789
×
7
=
610
×
7
=
258
×
1
=
335
×
9
=
791
×
9
=
612
×
9
=
259
×
2
=
336
×
2
=
793
×
2
=
614
×
2
=
260
×
3
=
337
×
4
=
795
×
4
=
616
×
4
=
261
×
4
=
338
×
8
=
797
×
8
=
618
×
8
=
262
×
5
=
339
×
1
=
799
×
1
=
620
×
1
=
263
×
6
=
340
×
3
=
801
×
3
=
622
×
3
=
264
×
7
=
341
×
3
=
803
×
3
=
624
×
3
=
265
×
8
=
342
×
5
=
805
×
5
=
626
×
5
=
266
×
9
=
343
×
7
=
807
×
7
=
628
×
7
=
267
×
1
=
344