1樓:匿名使用者
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 (2)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×(3.87-0.13)+4.2×3.74
50.32.52-(6+9.728÷3.2)×2.5
希望採納,謝謝。祝愉快
2樓:一路雁影
1+1-1÷1×1=1
50道簡便計算題及答案
3樓:聆聽萬物
簡便計算例子演示17×48+17×32
解題思路:四則運算規則(按順序計算,先算乘除後算加減,有括號先算括號,有乘方先算乘方)即脫式運算(遞等式計算)需在該原則前提下進行
解題過程:
17×48+17×32
=17×(48+32)
=17×80
=1360
擴充套件資料(豎式計算-計算結果):先將兩乘數末位對齊,然後分別使用第二個乘數,由末位起對每一位數依次乘上一個乘數,最後將所計算結果累加即為乘積,如果乘數為小數可先將其擴大相應的倍數,最後乘積在縮小相應的倍數;
解題過程:
步驟一:7×80=560
步驟二:1×80=800
根據以上計算結果相加為1360
存疑請追問,滿意請採納
4樓:世鶯鶯
12×9+12==
12×9+12
=12×(9+1)
=12×10
=120
5樓:凌月霜丶
(1)2.5*32*0.125
=(2.5*4)*(8*0.125)
=10*1
=10(2)3.5-7+6.5
=3.5+6.5-7
=3(3)1.2×2.5+0.8×2.5
=2.5(1.2+0.8)
=25(4)8.9×1.25-0.9×1.25
=1.25(8.9-0.9)
=10(5)12.5×7.4×0.8
=12.5×0.8×7.4
=74(6)6.5×9.5+6.5×0.5
=6.5×(9.5+0.5)
=6.5×10
=65(7)0.35×1.6+0.35×3.4
=0.35*(1.6+3.4)
=0.35*5
=1.75
(8)6.72-3.28-1.72
=6.75-(3.28+1.72)
=6.75-5
=1.75
(9)0.45+6.37+4.55
=0.45+4.55+6.37
=5+6.37
=11.37
(10)28×12.5-12.5×20
=(28-20)*12.5
=8*12.5
=100
(11)23.65-(3.07+3.65)
=23.65-3.65-3.07
=20-3.07
=16.93
(12)(4+0.4×0.25)8×7×1.25
=(4+1)*7*10
=5*7*10
=350
(13)1.65×99+1.65
=1.65*(99+1)
=1.65*100
=165
(14)27.85-(7.85+3.4)
=27.85-7.85+3.4
=20+3.4
=23.4
(15)48×1.25+50×1.25×0.2×8
7.8×9.9+0.78
=7.8*(9.9+0.1)
=7.8*10
=78(16)4.8×46+4.8×54
=(46+54)*4.8
=100*4.8
=480
(17)673-327-173
=673-(327+173)
=673-500
=173
(18)4.44*2.5
=1.11*(4*2.5)
=1.11*10
=11.1
(19)3.5÷1.4
=(3.5÷0.7)÷(1.4÷0.7)
=5÷2
=2.5
(20)1+2+3+4+5......+99+100
=(1+99)+(2+98)+(3+97)+......+(49+51)+50
=(100÷2-1)*100+50
=4900+50
=4950⑴運用加法交換律進行簡便計算。
0.88+5.6+0.12 1.78+3.5+0.22 5.6+2.08+14.4
=0.88+0.12+5.6 =1.78+0.22+3.5 =5.6+14.4+2.08
=1+5.6 =2+3.5 =20+2.08
=6.6 =5.5 =22.08
⑵運用加法結合律進行簡便計算
2.3+(0.56+4.7) 28.6+0.54+0.46+1.4 5.82+4.56+5.44
=(2.3+4.7)+0.56 =(28.6+1.4)+(0.54+0.46) =5.82+(4.56+5.44)
=7+0.56 =30+1 =5.82+10
=7.56 =31 =15.82
⑶、運用乘法交換律進行簡便計算。
25×0.37×0.4 7.5×0.39×4 6.5×1.1×4 1.25×3.9×0.8
=25×0.4×0.37 =7.5×4×0.39 =6.5×4×1.1 =1.25×0.8×3.9
=10×0.37 =30×0.39 =26×1.1 =1×3.9
=3.7 =11.7 =28.6 =3.9
⑷、運用乘法結合律進行簡便計算。
1.9×7.5×8 6.2×0.8×2.5 4.3×1.5×6 4.1×3.5×2
=1.9×(7.5×8) =6.2×(0.8×2.5) =4.3×(1.5×6) =4.1×(3.5×2)
=1.9×60 =6.2×2 =4.3×9 =4.1×7
=114 =12.4 =38.7 =28.7
⑸、運用乘法分配律的加法進行簡算。
13.6×4.6+4.6×6.4 0.72×23+77×0.72 2.6×32+32×2.4
=(13.6+6.4)×4.6 =(23+77)×0.72 =(2.6+2.4) ×32
=20×6.4 =100×0.72 =5×32
=128 =72 =160
⑹、運用乘法分配律的減法進行簡算。
12×5.9-5.9×2 4.6×2.5-2.5×0.6 101×9.7-9.7
=(12-2) ×5.9 =(4.6-0.6)×2.5 =(101-1)×9.7
=(12-2) ×5.9 =(4.6-0.6)×2.5 =(101-1)×9.7
=10×5.9 =4×2.5 =100×9.7
=59 =10 =970
⑺、運用減法的運算規律進行簡便計算。
1.8-0.45-0.55 54.4-4.6-5.4 35.6-0.13-0.47
=1.8-(0.45+0.55) =54.4-(4.6+5.4) =35.6-(0.13+0.47)
=1.8-1 =54.4-10 =35.6-0.6
=0.8 =44.4 =35
⑻、運用除法的運算規律進行簡便計算。
4.5÷4÷7.5 14.8÷1.25÷8 18.5÷4÷1.25 5.4÷4÷0.45
=4.5÷(4×7.5) =14.8÷(1.25×8) =18.5÷(4×1.25) =5.4÷(4×0.45)
=4.5÷30 =14.8÷10 =18.5÷5 =5.4÷0.18
=0.15 =1.48 =3.7 =30
⑼綜合運用各種運算定律進行簡算。
2.54+2.46+0.44+0.54 10.7×0.4-6.7×0.4 0.5×3.2×1.25
=(2.54+2.46)+(0.44+0.54) =(10.7-6.7)×0.4 =(0.5×4)×(0.8×1.25)
=5+1 =4×0.4 =2×1
=6 =1.6 =2
89.7+5.8-9.7+4.2 99×0.38+0.38 360÷(18×0.4)
=(89.7-9.7)+(5.8+4.2) =(99+1) ×0.38 =360÷18÷0.4
=80+10 =100×0.38 =20÷0. 4
=90 =38 =50
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