1. 直接写出得数。
46 + 47 = 210 - 160 = 160 - 90 = 60 + 38 - 9 =
67 + 32 = 1580 - 900 = 1300 + 700 = 92 - 60 + 50 =
70 + 90 = 320 - 60 = 1200 - 800 = 63 + 17 - 40 =
74 - 26 = 800 + 670 = 870 - 800 = 54 - 30 + 16 =
93 ÷ 3 = 450 + 150 = 1200 - 400 = 64 - 10 - 24 =
38 + 45 = 770 + 240 = 70 + 900 = 22 + 30 + 37 =
22 × 4 = 750 - 70 = 250 - 70 = 69 + 20 - 18 =
11 × 3 = 300 + 150 = 1600 + 400 = 20 + 28 + 30 =

1. 93 50 70 89
99 680 2000 82
160 260 400 40
48 1470 70 40
31 600 800 30
83 1010 970 89
88 680 180 71
33 450 2000 78

2. 用竖式计算，带 * 的要验算。
498 + 204 = 643 - 285 = * 703 - 437 =
600 - 292 = * 427 + 384 = 375 + 187 - 89 =

2. 702 358 266
308 811 473
竖式及验算略

3. 填表。

3. 505 432 255 621