$740 - 480 = $
$380 + 580 = $
$500 × 12 = $
$3000 ÷ 20 = $
$670 - 480 = $
$360 + 390 = $
$14 × 600 = $
$6400 ÷ 40 = $
$650 + 350 = $
$200 × 460 = $
$4200 ÷ 30 = $
$740 - 250 = $
$160 + 470 = $
$180 × 200 = $
$8100 ÷ 30 = $
$970 - 590 = $
$130 × 600 = $
$9600 ÷ 40 = $
$670 + 480 = $
$780 ÷ 39 = $
$810 ÷ 27 = $
第71片

解析：这些题目都是基础的数学运算题目，包括加法、减法、乘法和除法。我们只需要按照基本的算术规则进行计算即可。
答案：
$740 - 480 = 260$
$380 + 580 = 960$
$500 × 12 = 6000$
$3000 ÷ 20 = 150$
$670 - 480 = 190$
$360 + 390 = 750$
$14 × 600 = 8400$
$6400 ÷ 40 = 160$
$650 + 350 = 1000$
$200 × 460 = 92000$
$4200 ÷ 30 = 140$
$740 - 250 = 490$
$160 + 470 = 630$
$180 × 200 = 36000$
$8100 ÷ 30 = 270$
$970 - 590 = 380$
$130 × 600 = 78000$
$9600 ÷ 40 = 240$
$670 + 480 = 1150$
$780 ÷ 39 = 20$
$810 ÷ 27 = 30$

$470 + 270 = $
$350 - 190 = $
$9600 ÷ 80 = $
$25 × 300 = $
$530 + 290 = $
$7800 ÷ 20 = $
$160 × 60 = $
$610 - 520 = $
$3600 ÷ 20 = $
$190 × 400 = $
$360 + 540 = $
$810 - 630 = $
$7600 ÷ 40 = $
$400 × 23 = $
$270 + 390 = $
$530 - 340 = $
$8500 ÷ 50 = $
$200 × 360 = $
$7500 ÷ 50 = $
$750 ÷ 30 = $
$7500 ÷ 30 = $

解析：
这些题目都是基础的数学运算，包括加法、减法、乘法和除法。我们只需要按照基本的算术规则进行计算即可。
答案：
$470 + 270 = 740$
$350 - 190 = 160$
$9600 ÷ 80 = 120$
$25 × 300 = 7500$
$530 + 290 = 820$
$7800 ÷ 20 = 390$
$160 × 60 = 9600$
$610 - 520 = 90$
$3600 ÷ 20 = 180$
$190 × 400 = 76000$
$360 + 540 = 900$
$810 - 630 = 180$
$7600 ÷ 40 = 190$
$400 × 23 = 9200$
$270 + 390 = 660$
$530 - 340 = 190$
$8500 ÷ 50 = 170$
$200 × 360 = 72000$
$7500 ÷ 50 = 150$
$750 ÷ 30 = 25$
$7500 ÷ 30 = 250$

$500 ÷ 50 = $
$7200 ÷ 90 = $
$6 × 308 = $
$920 ÷ 20 = $
$609 ÷ 7 = $
$80 × 808 = $
$636 ÷ 6 = $
$500 + 7 × 300 = $
$360 ÷ 36 = $
$855 ÷ 3 = $
$231 ÷ 7 = $
$(119 - 8) ÷ 3 = $
$500 ÷ 50 × 2 = $
$9 × 903 + 4 = $
$999 ÷ 999 = $
$500 + 77 × 3 = $
$8 × 207 + 8 = $
$800 × (44 + 3) = $
$23 × 99 + 23 = $
$23 × 101 - 23 = $
$231 ÷ 11 = $

解析：
这些题目主要考查基础的数学运算能力，包括除法、乘法、加法和减法等。
答案：
$500 ÷ 50 = 10$；
$7200 ÷ 90 = 80$；
$6 × 308 = 1848$；
$920 ÷ 20 = 46$；
$609 ÷ 7 = 87$；
$80 × 808 = 64640$；
$636 ÷ 6 = 106$；
$500 + 7 × 300 = 500 + 2100 = 2600$；
$360 ÷ 36 = 10$；
$855 ÷ 3 = 285$；
$231 ÷ 7 = 33$；
$(119 - 8) ÷ 3 = 111 ÷ 3 = 37$；
$500 ÷ 50 × 2 = 10 × 2 = 20$；
$9 × 903 + 4 = 8127 + 4 = 8131$；
$999 ÷ 999 = 1$；
$500 + 77 × 3 = 500 + 231 = 731$；
$8 × 207 + 8 = 1656 + 8 = 1664$；
$800 × (44 + 3) = 800 × 47 = 37600$；
$23 × 99 + 23 = 23 × (99 + 1) = 23 × 100 = 2300$；
$23 × 101 - 23 = 23 × (101 - 1) = 23 × 100 = 2300$；
$231 ÷ 11 = 21$。