1. 直接写出得数。(40☆)
$42 + 53 = $ $30 + 42 = $ $820 - 60 = $ $4700 + 300 = $
$95 - 72 = $ $75 - 50 = $ $40 + 520 = $ $4800 - 400 = $
$39 + 43 = $ $30 + 37 = $ $500 - 50 = $ $800 + 3200 = $
$34 - 16 = $ $60 - 46 = $ $70 + 460 = $ $6500 - 700 = $
$37 + 52 = $ $45 + 40 = $ $800 - 80 = $ $900 + 6100 = $
$65 + 17 = $ $17 + 60 = $ $60 + 140 = $ $5800 - 500 = $
$70 - 34 = $ $84 - 80 = $ $950 - 90 = $ $500 + 7000 = $
$41 - 29 = $ $71 - 50 = $ $50 + 350 = $ $6800 - 600 = $
$37 + 25 = $ $48 + 30 = $ $300 - 40 = $ $3200 + 300 = $
$44 - 18 = $ $95 - 70 = $ $70 + 230 = $ $4700 - 400 = $

95 72 760 5000
23 25 560 4400
82 67 450 4000
18 14 530 5800
89 85 720 7000
82 77 200 5300
36 4 860 7500
12 21 400 6200
62 78 260 3500
26 25 300 4300

2. 用竖式计算。(18☆)
$563 + 76 = $ $565 + 284 = $ $353 + 267 - 438 = $
$643 - 85 = $ $720 - 483 = $ $900 - 369 - 187 = $

-2.639 849 182
558 237 344