分析:混合运算的题目按照先算乘除,再算加减,有括号的先算括号里面的顺序计算;其它题目按照运算法则直接求解.
解答:
解: 30×2=60, |
52×7=364, |
80×6=480, |
100×4=400, |
400×8=3200, |
| 900×5=4500, |
40×6=240, |
10×9=90, |
3×8=24, |
10×5=50, |
| 7×200=1400, |
800×6=4800, |
80÷4=20, |
240÷6=40, |
360÷9=40, |
| 108×7=756, |
810÷9=90, |
67+8=75, |
82+7=89, |
104×3=312, |
| 0×105=0, |
23×3=69, |
64÷2=32, |
2400÷8=300, |
33÷3=11, |
| 3×400=1200, |
840÷2=420, |
12×3=36, |
400÷5=80, |
5400÷9=600, |
| 180+170=350, |
500-192=308, |
540÷3=180, |
560+80=640, |
(25-7)×0=0, |
| 0÷8=0, |
21×7=147, |
80-90=-10, |
660÷6=110, |
88÷8=11, |
| 48+73=121, |
640÷8=80, |
710-30=680, |
5400÷6=900, |
80×7=560, |
| 88÷8=11, |
17×3=51, |
16×4=64, |
200×6=1200, |
14×5=70; |
| 200×4=800, |
180÷3=60, |
320÷8=40, |
0÷9=0, |
30×8=240, |
| 50×3=150, |
360÷6=60, |
86+7=93, |
80÷4=20, |
630÷3=210, |
| 24×2=48, |
120÷6=20, |
600×4=2400, |
210×2=420, |
48÷4=12, |
| 90-8=82, |
400×5=2000, |
31×3=93, |
900×7=6300, |
200×9=1800, |
| 33×2=66, |
600×6=3600, |
2000×3=6000, |
800×7=5600, |
123×3=369, |
| 36÷3=12, |
88÷4=22, |
3×30=90, |
450÷5=90, |
700÷7=100, |
| 8×6=48, |
42÷7=6, |
18÷3=6, |
24÷3=8, |
5×0×3=0, |
| 32÷8=4, |
5×6=30, |
54÷4=13.5, |
9×50=450, |
16+7×2=30, |
| 81÷9=9, |
10×3=30, |
48÷8=6, |
20×7=140, |
32÷4+13=21, |
| 9×4=36, |
6×500=3000, |
300×4=1200, |
900×2=1800, |
(5+25)×4=120, |
| 37×6=222, |
45×3=135, |
64÷2=32, |
23×4=92, |
19×3=57, |
| 36×2=72, |
47×3=141, |
48×2=96, |
15×2=30, |
39×4=156, |
| 300÷60=5, |
90÷6=15, |
72÷8=9, |
910÷7=130, |
75-28=47, |
| 60+180=240, |
420-80=340, |
68÷4=17, |
280+60=340, |
28+25=53, |
| 360÷40=9, |
540÷60=9, |
30÷3=10, |
270+50=320, |
14×7=98, |
| 62+18=80, |
15×6=90, |
420÷70=6, |
95÷5=19, |
750-300=450, |
| 16×5=80, |
92-48=44, |
21×40=840, |
720÷80=9, |
65÷13=5, |
| 17×4=68, |
68÷17=4, |
70÷14=5, |
90÷15=6, |
80÷16=5, |
| 72-24=48, |
900÷18=50, |
750÷25=30, |
84÷21=4, |
20×40=800. |
点评:本题考查了基本的计算题目,计算时要细心,平时要多总结这类题目的窍门.