1. 比一比,算一算。
704 - 384 = 500 - 345 = 1000 - 888 =
704 - 387 = 502 - 345 = 1000 - 88 =
704 - 397 = 520 - 345 = 1000 - 8 =
704 - 384 = 500 - 345 = 1000 - 888 =
704 - 387 = 502 - 345 = 1000 - 88 =
704 - 397 = 520 - 345 = 1000 - 8 =
答案:
320 317 307
155 157 175
112 912 992
155 157 175
112 912 992
2. 请分别算出下面两户人家这个月的实用电数。(单位:千瓦时)
|户名|上月读数|本月读数|实用电数|
|----|----|----|----|
|王军|738|826|( )|
|李宁|805|902|( )|
|户名|上月读数|本月读数|实用电数|
|----|----|----|----|
|王军|738|826|( )|
|李宁|805|902|( )|
答案:
88 97
3. 用竖式计算,并验算。
478 - 186 523 - 149 300 - 66
478 - 186 523 - 149 300 - 66
答案:
292 374 234
4. 填表。
|被减数|563|345|803|505|900|
|----|----|----|----|----|----|
|减 数|172|256|79|301|432|
|差| | | | | |
|被减数|563|345|803|505|900|
|----|----|----|----|----|----|
|减 数|172|256|79|301|432|
|差| | | | | |
答案:
391 89 724 204 468
5. 算一算。
625 - 18 - 349 = 526 - 278 - 156 =
600 - 234 - 178 = 800 - 179 + 234 =
215 + 467 - 298 = 345 + 466 - 523 =
625 - 18 - 349 = 526 - 278 - 156 =
600 - 234 - 178 = 800 - 179 + 234 =
215 + 467 - 298 = 345 + 466 - 523 =
答案:
258 92 188 855 384 288
口算天天练
80 - 60 =
50 - 40 =
84 + 60 =
40 + 82 =
19 + 30 =
62 - 14 =
66 + 30 =
52 - 49 =
72 - 58 =
50 + 88 =
86 - 47 =
20 + 10 =
40 + 18 =
90 + 43 =
30 + 20 =
80 - 60 =
50 - 40 =
84 + 60 =
40 + 82 =
19 + 30 =
62 - 14 =
66 + 30 =
52 - 49 =
72 - 58 =
50 + 88 =
86 - 47 =
20 + 10 =
40 + 18 =
90 + 43 =
30 + 20 =
答案:
口算天天练
76 - 32 =
90 - 54 =
38 + 40 =
60 + 19 =
33 + 50 =
20 + 39 =
18 + 70 =
18 + 31 =
52 + 39 =
30 + 11 =
30 + 28 =
40 + 56 =
22 + 33 =
95 - 40 =
22 + 66 =
76 - 32 =
90 - 54 =
38 + 40 =
60 + 19 =
33 + 50 =
20 + 39 =
18 + 70 =
18 + 31 =
52 + 39 =
30 + 11 =
30 + 28 =
40 + 56 =
22 + 33 =
95 - 40 =
22 + 66 =
答案:
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