Question

帮我回答一道数学题 急需答案 急 急 急 急 急 急急急急急急急急急急急急急

1.小菲参加一次英语竞赛,一共20题,规定做对一题得5分,做错一题不但不得分,还要倒扣2分,结果她得了79分.你知道她做错了几题吗?
2.苏州市出租车起步价是10元3千米,以后每小时行1千米付1.8元,媛媛和爸爸从家到外婆家共付车费13.6元.媛媛家到外婆家大约有多少千米?(列方程解答)
3.有甲,乙两堆棋子，甲堆的棋子数是乙堆的一半，如果从乙堆里取出9颗放入甲堆，这样两堆棋子的颗数就相同了。求原来早堆有多少颗棋子？
哪位能帮忙，请回答详细些，最好把简单思路说一下，万分感谢。在线等。
问题补充：因为是小学六年级的数学题，刚学方程式，请简单些。
有一排电线杆，原来每两根之间相距 米，现在要改成每两根之间相距 米，如果第一跟不动，那么至少在隔（）米可以有一根不移动，这根是原来的第（）根，是现在的第（）根。
小名做了20道数学题，做对一道题得5分，做错一道题扣3分，结果小名得了60分，小名做对几道题？
道数学题，全班40人做对，10人做错，这道题的正确率是（ ）%
1.45+15×6=
2.250÷5×8=
3.6×5÷2×4=
4.30×3+8=
5.400÷4+20×5=
6.10+12÷3+20=
7.(80÷20+80)÷4=
8.70+(100-10×5)=
9.360÷40=
10.40×20=
11.80-25=
12.70+45=
13.90×2=
14.16×6=
15.300×6=
16.540÷9=
17.30×20=
18.400÷4=
19.350-80=
20.160+70=
21.18-64÷8=
22.42÷6+20=
23.40-5×7=
24.80+60÷3=
25.41+18÷2=
26.75-11×5=
27.42+7-29=
28.5600÷80=
29.25×16=
30.120×25=
31.36×11=
32.1025÷25=
33.336+70=
34.25×9×4=
35.200-33×3=
36.3020-1010=
37.12×50=
38.25×8=
39.23×11=
40.125÷25=
41.4200-2200=
42.220+80=
43.20×8×5=
44.600-3×200=
45.20+20÷2=
46.35-25÷5=
47.36+8-40=
48.2800÷40=
49.98÷14 =
50.96÷24 =
51.56÷14 =
52.65÷13 =
53.75÷15 =
54.120÷24 =
55.200÷25 =
56.800÷16 =
57.840÷21 =
58.560÷14 =
59.390÷13 =
60.600÷15 =
61.72÷24 =
62.85÷17 =
63.90÷15 =
64.96÷16 =
65.78÷26 =
66.51÷17 =
67.80÷40 =
68.100÷20 =
69.100÷4 =
70.240÷40 =
71.920÷4 =
72.300÷60=
73.64÷2 =
74.64÷4 =
75.50÷5 =
76.60÷8 =
77.96÷4 =
78.90÷6 =
79.400+80 =
80.400-80 =
81.40×80 =
82.400÷80 =
83.48÷16 =
84.96÷24 =
85.160×5=
86.4×250=
87.0×518=
88.10×76=
89.36×10=
90.15×6=
91.24×3=
92.5×18=
93.26×4=
94.7×15=
95.32×30=
96.40×15=
97.60×12=
98.23×30=
99.30×50=
100.5×700=

Answer 1

.45+15×6= 135
2.250÷5×8= 400
3.6×5÷2×4= 60
4.30×3+8= 98
5.400÷4+20×5= 200
6.10+12÷3+20= 34
7.(80÷20+80)÷4= 21
8.70+(100-10×5)=120
9.360÷40= 9
10.40×20= 800
11.80-25= 55
12.70+45= 115
13.90×2= 180
14.16×6= 96
15.300×6= 1800
16.540÷9= 60
17.30×20= 600
18.400÷4= 100
19.350-80= 270
20.160+70= 230
21.18-64÷8= 10
22.42÷6+20= 27
23.40-5×7= 5
24.80+60÷3= 100
25.41+18÷2= 50
26.75-11×5= 20
27.42+7-29= 20
28.5600÷80= 70
29.25×16= 400
30.120×25= 300
31.36×11= 396
32.1025÷25= 41
33.336+70= 406
34.25×9×4= 900
35.200-33×3= 101
36.3020-1010= 2010
37.12×50=600
38.25×8= 200
39.23×11= 253
40.125÷25= 5
41.4200-2200= 2000
42.220+80= 300
43.20×8×5= 800
44.600-3×200= 0
45.20+20÷2= 30
46.35-25÷5= 30
47.36+8-40= 4
48.2800÷40= 70
49.98÷14 = 7
50.96÷24 = 4
51.56÷14 = 4
52.65÷13 = 5
53.75÷15 = 5
54.120÷24 = 5
55.200÷25 = 8
56.800÷16 = 50
57.840÷21 = 40
58.560÷14 = 40
59.390÷13 = 30
60.600÷15 = 40
61.72÷24 = 3
62.85÷17 = 5
63.90÷15 = 6
64.96÷16 = 6
65.78÷26 = 3
66.51÷17 = 3
67.80÷40 = 2
68.100÷20 = 5
69.100÷4 = 25
70.240÷40 = 6
71.920÷4 =230
72.300÷60= 5
73.64÷2 = 32
74.64÷4 = 16
75.50÷5 =10
76.60÷8 = 7.5
77.96÷4 = 24
78.90÷6 = 15
79.400+80 = 480
80.400-80 =320
81.40×80 = 3200
82.400÷80 =5
83.48÷16 = 3
84.96÷24 = 4
85.160×5= 800
86.4×250= 1000
87.0×518= 0
88.10×76= 760
89.36×10=360
90.15×6= 90
91.24×3= 72
92.5×18= 90
93.26×4= 104
94.7×15= 105
95.32×30= 960
96.40×15= 600
97.60×12= 720

Answer 2

45+15×6= 135
2.250÷5×8= 400
3.6×5÷2×4= 60
4.30×3+8= 98
5.400÷4+20×5= 200
6.10+12÷3+20= 34
7.(80÷20+80)÷4= 21
8.70+(100-10×5)=120
9.360÷40= 9
10.40×20= 800
11.80-25= 55
12.70+45= 115
13.90×2= 180
14.16×6= 96
15.300×6= 1800
16.540÷9= 60
17.30×20= 600
18.400÷4= 100
19.350-80= 270
20.160+70= 230
21.18-64÷8= 10
22.42÷6+20= 27
23.40-5×7= 5
24.80+60÷3= 100
25.41+18÷2= 50
26.75-11×5= 20
27.42+7-29= 20
28.5600÷80= 70
29.25×16= 400
30.120×25= 300
31.36×11= 396
32.1025÷25= 41
33.336+70= 406
34.25×9×4= 900
35.200-33×3= 101
36.3020-1010= 2010
37.12×50=600
38.25×8= 200
39.23×11= 253
40.125÷25= 5
41.4200-2200= 2000
42.220+80= 300
43.20×8×5= 800
44.600-3×200= 0
45.20+20÷2= 30
46.35-25÷5= 30
47.36+8-40= 4
48.2800÷40= 70
49.98÷14 = 7
50.96÷24 = 4
51.56÷14 = 4
52.65÷13 = 5
53.75÷15 = 5
54.120÷24 = 5
55.200÷25 = 8
56.800÷16 = 50
57.840÷21 = 40
58.560÷14 = 40
59.390÷13 = 30
60.600÷15 = 40
61.72÷24 = 3
62.85÷17 = 5

Answer 3

好厉害啊！我不得不佩服你！有这时间你自己早就算出来了！另外，纠正你一个错误，你题目上说的是“帮我回答一道数学题”，结果就出了100多道，是你题目上说的100多倍！！！

Answer 4

5加2等于7
20乘5等于100
依此类推
........
.......

Answer 5

(1)(100—79)除以(5+2) =21除以7 =3(题) (2)1.8(x—8)=13.6—8 最后+回1就可以了