求分数、小数的口算、解方程和混合运算题
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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
1 0.75/3/4/7/9
2 0.125/32/49/8
3 2/5+9又 4/5+99又4/5
4 (1.6+3又1/5)*1/8
5 1/2*1/3/1/2*1/3
6 21.7-(15.7+2又1/3)
7 6又1/3+4又5/8+5.375+3又2/3
8 1/7*(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%
14 1/(1又1/5-0.2)
15 (1/2+1/3-5/6)*12
16 36*(1-75%)
17 1.1-0.75/3/4
18 1000/125*8-1
19 4/9*4/9
20 3.25/2.5/4
21 38又3/4-15.38+61.25-4.62
22 13又2/13-2.25-7又3/4
23 2/13*(0.15*13)
24 (1/6+1/8)*24
25 63*(1/7)*30%
26.(0.75+0.2)/0.25*25%
27 64.5*1/11+1/11*34又1/2
28 2.5*3/7*0.4*2又1/3
29 13.76-(7/12+1.76+1又5/12)
30 0.32*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+42 420+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