$80×7=$
$800÷4=$
$330÷3=$
$3×23=$
$64÷2=$
$58+26=$
$34×2=$
$550÷5=$
$800×8=$
$420÷2=$
$63÷3=$
$160÷4=$
$800+700=$
$690÷3=$
$58-0=$
$2×440=$
$48÷2=$
$480÷2=$
$960÷2=$
$960÷4=$
$920÷2=$
第22片

解析：
这些问题主要考查基础的数学运算能力，包括乘法、除法、加法和减法。
答案：
$80 × 7 = 560$
$800 ÷ 4 = 200$
$330 ÷ 3 = 110$
$3 × 23 = 69$
$64 ÷ 2 = 32$
$58 + 26 = 84$
$34 × 2 = 68$
$550 ÷ 5 = 110$
$800 × 8 = 6400$
$420 ÷ 2 = 210$
$63 ÷ 3 = 21$
$160 ÷ 4 = 40$
$800 + 700 = 1500$
$690 ÷ 3 = 230$
$58 - 0 = 58$
$2 × 440 = 880$
$48 ÷ 2 = 24$
$480 ÷ 2 = 240$
$960 ÷ 2 = 480$
$960 ÷ 4 = 240$
$920 ÷ 2 = 460$

$60×5=$
$2×44=$
$840÷4=$
$120-73=$
$29×3=$
$640+34=$
$640+153=$
$640+333=$
$320+755=$
$320+150=$
$340+358=$
$122+212=$
$3012+621=$
$222+1000=$
$2150+4200=$
$5800+1700=$
$1400+5600=$
$3258+6742=$
$370×3=$
$590×2=$
$980÷2=$

解析：
这些问题都是基础的数学运算，包括乘法、除法和加减法。我们可以直接计算。
答案：
$60 × 5 = 300$
$2 × 44 = 88$
$840 ÷ 4 = 210$
$120 - 73 = 47$
$29 × 3 = 87$
$640 + 34 = 674$
$640 + 153 = 793$
$640 + 333 = 973$
$320 + 755 = 1075$
$320 + 150 = 470$
$340 + 358 = 698$
$122 + 212 = 334$
$3012 + 621 = 3633$
$222 + 1000 = 1222$
$2150 + 4200 = 6350$
$5800 + 1700 = 7500$
$1400 + 5600 = 7000$
$3258 + 6742 = 10000$
$370 × 3 = 1110$
$590 × 2 = 1180$
$980 ÷ 2 = 490$

$49÷7=$
$76÷4=$
$74-47=$
$99÷3=$
$25×4=$
$300+1070=$
$250×2×0=$
$2500×4=$
$72-35=$
$47+36=$
$7900+1200=$
$9300-7100=$
$260×3=$
$370+530=$
$639÷9=$
$5000×9=$
$378×6\approx $
$607+295\approx $
$507-298\approx $
$408×7\approx $
$705÷7\approx $

解析：
这些题目主要考查了基础的数学运算能力，包括除法、乘法、加法和减法，以及估算。
答案：
$49 ÷ 7 = 7$
$76 ÷ 4 = 19$
$74 - 47 = 27$
$99 ÷ 3 = 33$
$25 × 4 = 100$
$300 + 1070 = 1370$
$250 × 2 × 0 = 0$
$2500 × 4 = 10000$
$72 - 35 = 37$
$47 + 36 = 83$
$7900 + 1200 = 9100$
$9300 - 7100 = 2200$
$260 × 3 = 780$
$370 + 530 = 900$
$639 ÷ 9 = 71$
$5000 × 9 = 45000$
$378 × 6 \approx 380 × 6 = 2280$
$607 + 295 \approx 600 + 300 = 900$
$507 - 298 \approx 500 - 300 = 200$
$408 × 7 \approx 400 × 7 = 2800$
$705 ÷ 7 \approx 700 ÷ 7 = 100$