【求分数、小数的口算、解方程和混合运算题】
求分数、小数的口算、解方程和混合运算题
【求分数、小数的口算、解方程和混合运算题】
求分数、小数的口算、解方程和混合运算题
分数,小数的口算
10.75/3/4/7/9
20.125/32/49/8
32/5+9又4/5+99又4/5
4(1.6+3又1/5)*1/8
51/2*1/3/1/2*1/3
621.7-(15.7+2又1/3)
76又1/3+4又5/8+5.375+3又2/3
81/7*(98*(1/4)*2)
9.25%*((23+2%)*4)
10.(30+20%)/2
11.12*3/(25+20%)
12.30/(3+40%)
13.27/8*16*10%
141/(1又1/5-0.2)
15(1/2+1/3-5/6)*12
1636*(1-75%)
171.1-0.75/3/4
181000/125*8-1
194/9*4/9
203.25/2.5/4
2138又3/4-15.38+61.25-4.62
2213又2/13-2.25-7又3/4
232/13*(0.15*13)
24(1/6+1/8)*24
2563*(1/7)*30%
26.(0.75+0.2)/0.25*25%
2764.5*1/11+1/11*34又1/2
282.5*3/7*0.4*2又1/3
2913.76-(7/12+1.76+1又5/12)
300.32*6.7+3.2*0.43-0.32
解方程
1、4X-5=3
4X=8
X=2
2、3X+150=1050
3X=900
X=300
3、9*1.8-12X=1.8
16.2-12X=1.8
-12X=-14.4
1:X+3X-5=3
2:3=1050
3:9*1.8-12X=1.8
4:2X÷8=1.25
12X=14.4
X=1.2
4、2X=1.25*8
2X=10
X=5
混合运算
1.3/7×49/9-4/3
2.8/9×15/36+1/27
3.12×5/6–2/9×3
4.8×5/4+1/4
5.6÷3/8–3/8÷6
6.4/7×5/9+3/7×5/9
7.5/2-(3/2+4/5)
8.7/8+(1/8+1/9)
9.9×5/6+5/6
10.3/4×8/9-1/3
11.7×5/49+3/14
12.6×(1/2+2/3)
13.8×4/5+8×11/5
14.31×5/6–5/6
15.9/7-(2/7–10/21)
16.5/9×18–14×2/7
17.4/5×25/16+2/3×3/4
18.14×8/7–5/6×12/15
19.17/32–3/4×9/24
20.3×2/9+1/3
21.5/7×3/25+3/7
22.3/14××2/3+1/6
23.1/5×2/3+5/6
24.9/22+1/11÷1/2
25.5/3×11/5+4/3
26.45×2/3+1/3×15
27.7/19+12/19×5/6
28.1/4+3/4÷2/3
29.8/7×21/16+1/2
30.101×1/5–1/5×21
31.50+160÷40(58+370)÷(64-45)
32.120-144÷18+35
33.347+45×2-4160÷52
34(58+37)÷(64-9×5)
35.95÷(64-45)
36.178-145÷5×6+42420+580-64×21÷28
37.812-700÷(9+31×11)(136+64)×(65-345÷23)
38.85+14×(14+208÷26)
39.(284+16)×(512-8208÷18)
40.120-36×4÷18+35
41.(58+37)÷(64-9×5)
42.(6.8-6.8×0.55)÷8.5
43.0.12×4.8÷0.12×4.8
44.(3.2×1.5+2.5)÷1.6
45.6-1.6÷4=5.38+7.85-5.37=
46.7.2÷0.8-1.2×5=6-1.19×3-0.43=
47.6.5×(4.8-1.2×4)=0.68×1.9+0.32×1.9
48.10.15-10.75×0.4-5.7
49.5.8
dui