脱式计算(能简算的要简算)①3 -2 +5 -1 ②14.85-1.58×8+31.2÷1.2 ③(1 +2 )÷(2-1 ) ④2.25× +2.75÷1 +60% ⑤9.81×0.1+0.5×98.1+0.049×981 ⑥1000+999-998-997+996+995-994-993+…+104

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脱式计算(能简算的要简算)①3 -2 +5 -1 ②14.85-1.58×8+31.2÷1.2 ③(1 +2 )÷(2-1 ) ④2.25× +2.75÷1 +60% ⑤9.81×0.1+0.5×98.1+0.049×981 ⑥1000+999-998-997+996+995-994-993+…+104

脱式计算(能简算的要简算)①3 -2 +5 -1 ②14.85-1.58×8+31.2÷1.2 ③(1 +2 )÷(2-1 ) ④2.25× +2.75÷1 +60% ⑤9.81×0.1+0.5×98.1+0.049×981 ⑥1000+999-998-997+996+995-994-993+…+104
脱式计算(能简算的要简算)
①3 -2 +5 -1
②14.85-1.58×8+31.2÷1.2
③(1 +2 )÷(2-1 )
④2.25× +2.75÷1 +60%
⑤9.81×0.1+0.5×98.1+0.049×981
⑥1000+999-998-997+996+995-994-993+…+104+103-102-101
第四题不用做,简算!

脱式计算(能简算的要简算)①3 -2 +5 -1 ②14.85-1.58×8+31.2÷1.2 ③(1 +2 )÷(2-1 ) ④2.25× +2.75÷1 +60% ⑤9.81×0.1+0.5×98.1+0.049×981 ⑥1000+999-998-997+996+995-994-993+…+104
3-2+5-1
=1+5-1
=5
14.85-1.58×8+31.2÷1.2
=14.85-12.64+26
=2.12+26
=28.12
(1+2)÷(2-1)
=3÷1
=3
9.81×0.1+98.1×0.5+0.049×981
=9.81×(0.1+5+4.9)
=9.81×10
=98.1

晕,用看的都可以看出答案,干吗还算。

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 ...

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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

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