1. 计算。
1000 - 800 = 578 + 142 = 637 + 204 =
170 + 30 = 237 + 435 = 340 + 275 =
500 + 40 = 240 + 153 = 581 + 160 =
900 + 100 = 189 + 215 = 308 + 217 =
1000 - 800 = 578 + 142 = 637 + 204 =
170 + 30 = 237 + 435 = 340 + 275 =
500 + 40 = 240 + 153 = 581 + 160 =
900 + 100 = 189 + 215 = 308 + 217 =
答案:
200 200 540 1000
720 672 393 404
841 615 741 525
720 672 393 404
841 615 741 525
2. 填表。
答案:
1000 403 1243 527
1180
1180
3. 用竖式计算。(带*号的要验算)
375 + 468 *239 + 85 216 + 468
375 + 468 *239 + 85 216 + 468
答案:
843 324 684
4. 把符合要求的算式填进相应的方框里。
187 + 213 384 + 616 357 + 143
75 + 325 298 + 202 568 + 432
187 + 213 384 + 616 357 + 143
75 + 325 298 + 202 568 + 432
答案:
等于1000:384+616
568+432
等于500:357+143 298+202
等于400:187+213 75+325
568+432
等于500:357+143 298+202
等于400:187+213 75+325
口算天天练
63 - 24 =
10 + 80 =
56 - 50 =
70 + 30 =
25 + 13 =
40 + 90 =
79 + 52 =
50 + 50 =
63 + 42 =
20 + 10 =
53 - 50 =
73 - 60 =
16 + 18 =
20 + 34 =
75 + 25 =
63 - 24 =
10 + 80 =
56 - 50 =
70 + 30 =
25 + 13 =
40 + 90 =
79 + 52 =
50 + 50 =
63 + 42 =
20 + 10 =
53 - 50 =
73 - 60 =
16 + 18 =
20 + 34 =
75 + 25 =
答案:
口算天天练
30 + 40 =
87 - 40 =
68 - 20 =
55 - 40 =
69 - 30 =
40 + 82 =
30 + 92 =
40 + 81 =
60 + 50 =
70 + 20 =
10 + 20 =
20 + 73 =
50 + 60 =
90 - 80 =
54 - 20 =
30 + 40 =
87 - 40 =
68 - 20 =
55 - 40 =
69 - 30 =
40 + 82 =
30 + 92 =
40 + 81 =
60 + 50 =
70 + 20 =
10 + 20 =
20 + 73 =
50 + 60 =
90 - 80 =
54 - 20 =
答案:
查看更多完整答案,请扫码查看