一、口算。
49 + 22 = 170 - 80 = 240 + 550 =
35 + 18 = 410 + 280 = 1600 - 900 =
32 + 18 = 220 + 260 = 20 + 190 =
36 - 19 = 440 - 30 = 140 - 70 =
73 - 44 = 120 - 50 = 630 + 240 =
24 + 37 = 350 + 220 = 490 - 80 =
60 - 39 = 120 - 90 = 260 - 40 =
61 - 17 = 460 - 50 = 360 + 340 =
49 + 22 = 170 - 80 = 240 + 550 =
35 + 18 = 410 + 280 = 1600 - 900 =
32 + 18 = 220 + 260 = 20 + 190 =
36 - 19 = 440 - 30 = 140 - 70 =
73 - 44 = 120 - 50 = 630 + 240 =
24 + 37 = 350 + 220 = 490 - 80 =
60 - 39 = 120 - 90 = 260 - 40 =
61 - 17 = 460 - 50 = 360 + 340 =
答案
71 90 790
53 690 700
50 480 210
17 410 70
29 70 870
61 570 410
21 30 220
44 410 700
53 690 700
50 480 210
17 410 70
29 70 870
61 570 410
21 30 220
44 410 700
二、用竖式计算。
86 + 258 + 94
79 + 88 + 65
305 + 87 + 288
237 + 68 + 259
337 + 118 + 276
216 + 267 + 329
86 + 258 + 94
79 + 88 + 65
305 + 87 + 288
237 + 68 + 259
337 + 118 + 276
216 + 267 + 329
答案
解:
1. $86 + 258 + 94$
86
+258
----
344
+ 94
----
438
结果为$\boldsymbol{438}$
2. $79 + 88 + 65$
79
+ 88
----
167
+ 65
----
232
结果为$\boldsymbol{232}$
3. $305 + 87 + 288$
305
+ 87
----
392
+288
----
680
结果为$\boldsymbol{680}$
4. $237 + 68 + 259$
237
+ 68
----
305
+259
----
564
结果为$\boldsymbol{564}$
5. $337 + 118 + 276$
337
+118
----
455
+276
----
731
结果为$\boldsymbol{731}$
6. $216 + 267 + 329$
216
+267
----
483
+329
----
812
结果为$\boldsymbol{812}$
1. $86 + 258 + 94$
86
+258
----
344
+ 94
----
438
结果为$\boldsymbol{438}$
2. $79 + 88 + 65$
79
+ 88
----
167
+ 65
----
232
结果为$\boldsymbol{232}$
3. $305 + 87 + 288$
305
+ 87
----
392
+288
----
680
结果为$\boldsymbol{680}$
4. $237 + 68 + 259$
237
+ 68
----
305
+259
----
564
结果为$\boldsymbol{564}$
5. $337 + 118 + 276$
337
+118
----
455
+276
----
731
结果为$\boldsymbol{731}$
6. $216 + 267 + 329$
216
+267
----
483
+329
----
812
结果为$\boldsymbol{812}$
登录