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$3600×3=
$180×3=
$530×60=
$500×40=
$600×50=
$120×40=
$260×30=
$136×40=
$501×200=
$190×3=
$230×7=
$130×70=
$12×400+7=
$420÷70×5=
$70×6÷30=
$2100×3-90=
$7200÷8÷90=
$120÷6×5=
$7×60÷3=
$210×30-9=
$720÷8÷90=
第74片
10800
$$180×3=
540
$$530×60=
31800
$$500×40=
20000
$$600×50=
30000
$$120×40=
4800
$$260×30=
7800
$$136×40=
5440
$$501×200=
100200
$$190×3=
570
$$230×7=
1610
$$130×70=
9100
$$12×400+7=
4807
$$420÷70×5=
30
$$70×6÷30=
14
$$2100×3-90=
6210
$$7200÷8÷90=
10
$$120÷6×5=
100
$$7×60÷3=
140
$$210×30-9=
6291
$$720÷8÷90=
10
$第74片
答案
解析：这些题目主要考查了多位数乘一位数、三位数乘两位数以及四则运算的掌握情况。对于乘法题目，直接应用乘法法则进行计算；对于包含加、减、除、乘的混合运算题目，需要按照运算的优先级（先乘除后加减，有括号先算括号内）进行计算。
答案：
$3600 × 3 = 10800$
$180 × 3 = 540$
$530 × 60 = 31800$
$500 × 40 = 20000$
$600 × 50 = 30000$
$120 × 40 = 4800$
$260 × 30 = 7800$
$136 × 40 = 5440$
$501 × 200 = 100200$
$190 × 3 = 570$
$230 × 7 = 1610$
$130 × 70 = 9100$
$12 × 400 + 7 = 4807$
$420 ÷ 70 × 5 = 30$
$70 × 6 ÷ 30 = 14$
$2100 × 3 - 90 = 6210$
$7200 ÷ 8 ÷ 90 = 10$
$120 ÷ 6 × 5 = 100$
$7 × 60 ÷ 3 = 140$
$210 × 30 - 9 = 6291$
$720 ÷ 8 ÷ 90 = 10$
答案：
$3600 × 3 = 10800$
$180 × 3 = 540$
$530 × 60 = 31800$
$500 × 40 = 20000$
$600 × 50 = 30000$
$120 × 40 = 4800$
$260 × 30 = 7800$
$136 × 40 = 5440$
$501 × 200 = 100200$
$190 × 3 = 570$
$230 × 7 = 1610$
$130 × 70 = 9100$
$12 × 400 + 7 = 4807$
$420 ÷ 70 × 5 = 30$
$70 × 6 ÷ 30 = 14$
$2100 × 3 - 90 = 6210$
$7200 ÷ 8 ÷ 90 = 10$
$120 ÷ 6 × 5 = 100$
$7 × 60 ÷ 3 = 140$
$210 × 30 - 9 = 6291$
$720 ÷ 8 ÷ 90 = 10$
$170×40=$
$130×70=$
$500×700=$
$600×80=$
$700×30=$
$209×8=$
$300×54=$
$390×20=$
$520×20=$
$209×80=$
$290×80=$
$250×40=$
$2500×40=$
$503×8=$
$290×70=$
$120×30=$
$400×80=$
$530×20=$
$240×50=$
$390×30=$
$480×30=$
6800
$130×70=$
9100
$500×700=$
350000
$600×80=$
48000
$700×30=$
21000
$209×8=$
1672
$300×54=$
16200
$390×20=$
7800
$520×20=$
10400
$209×80=$
16720
$290×80=$
23200
$250×40=$
10000
$2500×40=$
100000
$503×8=$
4024
$290×70=$
20300
$120×30=$
3600
$400×80=$
32000
$530×20=$
10600
$240×50=$
12000
$390×30=$
11700
$480×30=$
14400
答案
解析：这些题目都是基础的乘法口算题，需要直接计算出结果。
答案：
$170×40= 6800$；
$130×70= 9100$；
$500×700= 350000$；
$600×80= 48000$；
$700×30= 21000$；
$209×8= 1672$；
$300×54= 16200$；
$390×20= 7800$；
$520×20= 10400$；
$209×80= 16720$；
$290×80= 23200$；
$250×40= 10000$；
$2500×40= 100000$；
$503×8= 4024$；
$290×70= 20300$；
$120×30= 3600$；
$400×80= 32000$；
$530×20= 10600$；
$240×50= 12000$；
$390×30= 11700$；
$480×30= 14400$。
答案：
$170×40= 6800$；
$130×70= 9100$；
$500×700= 350000$；
$600×80= 48000$；
$700×30= 21000$；
$209×8= 1672$；
$300×54= 16200$；
$390×20= 7800$；
$520×20= 10400$；
$209×80= 16720$；
$290×80= 23200$；
$250×40= 10000$；
$2500×40= 100000$；
$503×8= 4024$；
$290×70= 20300$；
$120×30= 3600$；
$400×80= 32000$；
$530×20= 10600$；
$240×50= 12000$；
$390×30= 11700$；
$480×30= 14400$。
$6500-2300=
$900+4700=
$5600-800=
$8200-3800=
$7100-2900=
$2800+4100=
$3200+900=
$9200-500=
$4500-1800=
$2600+5200=
$7200-5300=
$8000-2000=
$8000-2400=
$4400+390=
$2900+5700=
$9100-2000=
$4300-1500=
$9500-7000=
$7800-2900=
$3500-1700=
$2700+3500=
4200
$$900+4700=
5600
$$5600-800=
4800
$$8200-3800=
4400
$$7100-2900=
4200
$$2800+4100=
6900
$$3200+900=
4100
$$9200-500=
8700
$$4500-1800=
2700
$$2600+5200=
7800
$$7200-5300=
1900
$$8000-2000=
6000
$$8000-2400=
5600
$$4400+390=
4790
$$2900+5700=
8600
$$9100-2000=
7100
$$4300-1500=
2800
$$9500-7000=
2500
$$7800-2900=
4900
$$3500-1700=
1800
$$2700+3500=
6200
$答案
解析：这些题目都是基础的加减法运算，主要考查学生的计算能力。
答案：
$6500 - 2300 = 4200$
$900 + 4700 = 5600$
$5600 - 800 = 4800$
$8200 - 3800 = 4400$
$7100 - 2900 = 4200$
$2800 + 4100 = 6900$
$3200 + 900 = 4100$
$9200 - 500 = 8700$
$4500 - 1800 = 2700$
$2600 + 5200 = 7800$
$7200 - 5300 = 1900$
$8000 - 2000 = 6000$
$8000 - 2400 = 5600$
$4400 + 390 = 4790$
$2900 + 5700 = 8600$
$9100 - 2000 = 7100$
$4300 - 1500 = 2800$
$9500 - 7000 = 2500$
$7800 - 2900 = 4900$
$3500 - 1700 = 1800$
$2700 + 3500 = 6200$
答案：
$6500 - 2300 = 4200$
$900 + 4700 = 5600$
$5600 - 800 = 4800$
$8200 - 3800 = 4400$
$7100 - 2900 = 4200$
$2800 + 4100 = 6900$
$3200 + 900 = 4100$
$9200 - 500 = 8700$
$4500 - 1800 = 2700$
$2600 + 5200 = 7800$
$7200 - 5300 = 1900$
$8000 - 2000 = 6000$
$8000 - 2400 = 5600$
$4400 + 390 = 4790$
$2900 + 5700 = 8600$
$9100 - 2000 = 7100$
$4300 - 1500 = 2800$
$9500 - 7000 = 2500$
$7800 - 2900 = 4900$
$3500 - 1700 = 1800$
$2700 + 3500 = 6200$
