4年级数学计算题答案?答案:计算下列各题,并尝试使用简便方法:① 5×6×9 = 270 ② 25×12 = 300 ③ 9×9 + 7 = 88 ④ 已知:a = 3,b = 4,求 a × b × 5 = 60 ⑤ 计算:1 + 2 + 3 + …… + 9 = 结果:× 项数 / 2)最终结果 = 45 解析:这类题目是数学运算的基本技能之一,那么,4年级数学计算题答案?一起来了解一下吧。
题目一:35 + 28 = 63
解释:个位数字相加,5加8等于13,进一位得3;十位数字相加,3加2等于5。最终结果为63。
题目二:81 - 46 = 35
解释:个位数字相减,1减6不够,向前借位,变成11减6得5;十位数字相减,由于个位借了十位1变为7再减4得3。所以结果为35。
题目三:12 × 3 = 36
解释:乘法口诀中“二六十二”乎察,即表示乘以两倍之后,再乘以三的口诀。因此,先计算两倍为24,再乘以三得到结果36。
题目四:72 ÷ 9 = 8
解释:除法口诀中“九八七十二”,表示被除数为七十二时岁轮茄,除数为九时商为八。因此,将七十二除以九得到的结果为八。
以上题目涉及基础的算术运算规则,要求学生对加减乘除的基本法则有清晰的理解并能熟练运算。通过大量的练习,可以提高学生的计算能力。这些题目是四年级数学课程中的重要组成部分,有助于培养学生的数学逻辑思维和计算能力。
你好,很高兴地解答你的问题。
1、56+31+24
=(56+24)+31
=80+31
=111
2、615+475+125
=615+(475+125)
=615+600
=1215
3、125×64
=125×8×8
=1000×8
=8000
4、 89+101+111
=101+(89+111)
=101+200
=301
5、24+127+476+573
=(24+476)+(127+573)
=500+700
=1200
6、400-273-127
=400-(273+127)
=400-400
=0
7、327+(96-127)
=327-127+96
=200+96
=296
8、70×98
=70×(100-2)
=7000-140
=6860
9、442-103-142
=442-142-103
=300-103
=197
10、999+99+9
=1000+100+10-3
=1110-3
=1107
11、67×5×2
=67×(5×2)
=67×10
=670
12、25×(78×4)
=25×4×78
=100×78
=7800
13、72×125
=9×(8×125)
=9×1000
=9000
14、9000÷125÷8
=9000÷(125×8)
=9000÷1000
=9
15、400÷25
=400÷100×4
=4×4
=16
16、25×36
=25×4×9
=100×9
=900
17、103×27
=(100+3)×27
=2700+81
=2781
18、76×102
=76×(100+2)
=7600+152
=7752
19、3600÷25÷4
=3600÷(25×4)
=3600÷100
=36
20、99×35
=(100-1)×35
=3500-35
=3465
21、(25+12)×4
=25×4+12×4
=100+48
=148
22、56×27+27×44
=(56+44)×27
=100×27
=2700
23、56×99+56
=56×(99+1)
=56×100
=5600
24、125×25×8×4
=125×8×(25×4)
=1000×100
=100000
25、25×32×125
=(25×4)×(8×125)
=100×1000
=100000

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 = 3000
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 = 4
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 = 74
94. 7 × 15 = 105
95. 32 × 30 = 960
96. 40 × 15 = 600
97. 60 × 12 = 720
98. 23 × 30 = 690
99. 30 × 50 = 1500
100. 5 × 700 = 3500

408-12×24 = 408 - 288 = 120
(46+28)×60 = 74 x 60 = 4440
42×50-17 = 2100- 17 = 2083
32+105÷5 = 32 + 21 = 53
420×(327-238) = 420 x 89 = 37380
(4121+2389)÷7 = 6510 ÷7 = 930
5180-705×6 = 5180 - 4230=950
405×(3213-3189) =405x24 = 9720
125×(97-81) =125x16 =2000
6942+480÷3 = 6942 + 160 = 7102
20+80÷4-20 = 20 + 20 -20 = 40 -20 = 20
100÷(32-30)×0 = 100 ÷2 x0= 50 x0 = 0
25×4-12×5 = 100 - 60 = 40
70×〔(42-42)÷18〕=70 x (0÷18) = 70x0 = 0
75×65+75×35 = 75 x (65 +35) = 75x100 = 7500
1. 67 ×21 +18 ×21 + 85 ×79
2. 375 ×480 + 6250 ×48
3. 321 ×81 + 321 ×19
4. 222222 ×999999
5. 333333 ×333333
6. 654321 ×909090 +654321 ×90909
7. 34 ×3535 -35 ×3434
8. 345345 ÷15015
9. 75 ×45 + 17 ×25
10. (48 ×75 ×81)÷(24 ×25 ×27)
【答案详解】
1. 67 ×21 +18 ×21 + 85 ×79
=21×(67+18)+85×79
=21×85+85×79
=85×(21+79)
=8500
2. 375 ×480 + 6250 ×48
=480×(375+625)
=480000
3. 321 ×81 + 321 ×19
=321×(81+19)
=32100
4. 222222 ×999999
=222222×(1000000-1)
=222222000000-222222
=222221777778
5. 333333 ×333333
=111111×999999
=111111×(1000000-1)
=111111000000-111111
=111110888889
6. 654321 ×909090 +654321×90909
=654321×999999
=654321×(100000-1)
=654321000000-654321
=654320345679
7. 34 ×3535 -35 ×3434
=34×35×101-35×34×101
=0
8. 345345 ÷15015
=345×1001÷(15×1001)
=345÷15×1001÷1001
=23
9. 75 ×45 + 17 ×25
=25×3×45+17×25
=25×(135+17)
=25×152
=25×4×38
=3800
10. (48 ×75 ×81)÷(24 ×25 ×27)
=48÷24×75÷25×81÷27
=2×3×3
=18
希望能帮到你,望采纳,谢谢!
以上就是4年级数学计算题答案的全部内容,题目一:35 + 28 = 63 解释:个位数字相加,5加8等于13,进一位得3;十位数字相加,3加2等于5。最终结果为63。题目二:81 - 46 = 35 解释:个位数字相减,1减6不够,向前借位,变成11减6得5;十位数字相减,由于个位借了十位1变为7再减4得3。所以结果为35。内容来源于互联网,信息真伪需自行辨别。如有侵权请联系删除。