二年级下册万以内加减法口算
-
520
+
490
p>
=
620
-
570
=
1170
-
280
=
470
+
5
80
=
720
-
590
=
580
+
230
=
598
+
2
04
=
357
+
448
=
250
+
380
=
1072
-
353
=
560
-
390
=
473
+
218
=
598
+
204
=
357
+
448
=
250
+
380
=
1072
-
353
=
560
-
390
=
473
+
218
=
276
+
3
61
=
358
+
587
=
743
-
489
=
1072
-
353
=
560
-
390
=
473
+
218
=
276
+
361
=
358
+
587
=
743
-
489
p>
=
180
p>
+
250
=
530
+
290
=
950
-
570
=<
/p>
450
-
360
=
280
+
540
=
854
-
180
=
276
+
361
=
<
/p>
180
+
250
=
530
450
-
360
=
280
850
-
580
=
350
p>
465
-
396
=
602
523
-
239
=
725
801
-
3
09
≈
202
1198-223
≈
959
1390
+
< br>653
≈
999
p>
452
+
349
≈
942
301
+
288
≈
653
520
+
490
=
620
470
+
580
=
720
358
+
587
=
+
290
=
+
5
40
=
+
160
=
-
314
=
-
536
=
+
196
≈
-
357
< br>≈
-
303
≈
< br>-
601
≈
-
< br>381
≈
-
570
=
-
590
=
-
489
=
-
570
=
-
180
=
-
560
=
-
538
=
-
356
=
+
198
≈
+
123
≈
+
189
≈
-
182
≈
+
749
≈
-
280
=
+
230
=
180
+
250
=
530
450
-
360
=
280
850
-
580
=
350
p>
465
-
396
=
602
523
-
239
=
725
801
-
3
09
≈
202
1198-223
≈
959
1390
+
< br>653
≈
452
+
349
≈
942
301
+
< br>288
≈
653
520
+
4
90
=
620
470
+
580
=
720
598
< br>+
204
=
357
+
290
=
+
540
=
+
160
=
-
314
=
-
536
=
+
196
≈
-
357
≈
-
303
≈
-
601
≈
-
381
≈
-
570
=
-
590
=
+
448
=
-
570
=
-
180
=
-
560
=
-
538
=
-
356
=
+
198
≈
+
123
≈
+
189
≈
-
182
≈
+
749
≈
-
280
=
+
230
=
+
380
=
850
-
5
80
=
350
465
-
396
=
602
523
< br>-
239
=
725
801
-
3
09
≈
202
1198-223
≈
959
1390
+
< br>653
≈
999
p>
452
+
349
≈
942
301
+
288
≈
653
580+250-470
650+590-580
=
=
= =
950
-
570+570
450
= =
= =
224
-
130+640
350
= =
= =
+
160
=
840
-
560
=
-
314
=
705
-
538
=
-
536
=
505
-
356
=
+
196
≈
508
+
198
≈
-
357
≈
249
+
123
≈
-
303
≈
401
+
189
≈
-
601
≈
392
-
182
≈
-
381
≈
552
+
749
≈
-
360+250
-
180+647
743
950
854
840
705
505
508
249
401
392
552
1170
580
950
854
840
705
505
508
249
999
401
392
552
1170
580
250