北師大版五年級下冊數學脫式計算練習題40題(有答案)

2021-03-23 13:43:50 字數 5767 閱讀 2992

1樓:匿名使用者

題目啊,這些資源都是找不到的。

五年級下冊脫式計算題及答案

2樓:小露解說

一、5.4÷1.8+240×1.5

=3+360

=363

二、9000÷72×(1.25×0.7×8)=9000÷72×7

=125×7

=875

三、61-(1.25+2.5×0.7)

=61-3

=58四、[(10-0.8)+9.85]-2÷0.125=19.05-2÷0.125

=19.05-16

=3.05

1、脫式計算,即遞等式計算,需將一系列的數字逐步計算。在脫式計算中要先算乘、除法,後算加、減法。在乘除法連繼計算時中,要按從左往右的順序依次計算,在四則運算中,加法和減法叫做第一級運算,乘法和除法叫做第二級運算。

3樓:葉聲紐

(31.8+3.2×

4)÷5

=(31.8+12.8)÷5

=44.6÷5

=8,92,

31.5×4÷(6+3)

=31.5×4÷9

=126÷9

=14.

0.64×25×7.8+2.2

=124.8+2.2

=127.

4樓:匿名使用者

你已經長大了 可以自己出題了

5樓:獨孤嶽麓

1、0.2008+2.008+20.08+200.8+2008

=0.2008×

(1+10+100+1000+10000)

=0.2008×11110

=2230.888

2、1÷(2÷3)÷(3÷4)÷(4÷5)÷(5÷6)÷……÷(2007÷2008)=1×3/2×4/3×5/4×6/5×……×2008/2007

=2008

3、1+1/3+1/6+1/10+……+1/2009×1004

=2×(1/2+1/6+1/12+1/20+……+1/2008×2009)

=2×(1-1/2+1/2-1/3+1/3-1/4+……+1/2008-1/2009)

=2×(1-1/2009)

=2×2008/2009

=4016/2009

4、2006個2006乘2007個2007再乘2008個2008的積的個位數是?

2006個2006的個位數字是6

2007個2007的個位數字是3

2008個2008的個位數字是6

6×3×6=108

所以2006個2006乘2007個2007再乘2008個2008的積的個位數字是8

5、325.24+425.24+625.24+925.24+525.24

=(300+400+600+900+500)+25.24×5

=2700+126.2

=2826.2

6、1/1×4+1/4×7+1/7×10+1/10×13+……+1/2005×2008

=(1-1/4+1/4-1/7+1/7-1/10+1/10-1/13+……+1/2005-1/2008)÷3

=(1-1/2008)÷3

=2007/2008÷3

=669/2008

6樓:匿名使用者

30+239-58x5o

7樓:匿名使用者

3×5+2=17,100乘8+3=803

8樓:匿名使用者

一、bai5.4÷

1.8+240×1.5

=3+360

=363

二、9000÷du72×(1.25×0.7×8)=9000÷72×7

=125×7

=875

三、61-(1.25+2.5×0.7)

=61-3

=58四、[(10-0.8)+9.85]-2÷0.125=19.05-2÷0.125

=19.05-16

=3.05

1、脫式計算,即遞等zhi式計算,需將一系列dao的數字逐步計算。在脫式計算中要先算乘、除法,後算加、減法。在乘除法連繼計算時中,要按從左往右的順序依次計算,在四則運算中,加法和減法叫做第一級運算,乘法和除法叫做第二級運算。

9樓:匿名使用者

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

3.416÷(0.016×35) = 3.416 ÷0.56 = 6.1

0.8×[(10-6.76)÷1.2] = 0.8 x(3.24÷1.2) = 0.8 x 2.7 = 2.16

5.67×0.2-0.62 = 1.134-0.62 = 0.514

0.4×0.7×0.25 = 0.4 x 0.25 x 0.7 = 0.1 x 0.7 = 0.07

0.78+5.436+1 = 6.216 +1 = 7.216

30.8÷[14-(9.85+1.07)] = 30.8 ÷ (14 - 10.92) = 30.8÷3.08 = 10

[60-(9.5+28.9)]÷0.18 = (60- 38.4)÷0.18 = 21.6 ÷0.18 = 120

2.881÷0.43-0.24×3.5 = 6.7 - 0.24 x3.5 = 6.7 - 0.84 = 5.86

20×[(2.44-1.8)÷0.

4+0.15] = 20x (0.64 ÷0.

4 +0.15)= 20x(1.6 +0.

15) = 20 x1.75 = 35

28-(3.4+1.25×2.4) = 28 - (3.4 + 3) = 28 - 6.4 = 21.6

2.55×7.1+2.45×7.1 = (2.55 + 2.45) x7.1 = 5 x7.1=35.5

0.8×〔15.5-(3.21+5.79)〕 = 0.8 x (15.5 - 9) = 0.8 x 6.5 = 5.2

(31.8+3.2×4)÷5 = (31.8 + 12.8)÷5 = 44.6÷5 = 8.92

31.5×4÷(6+3) = 126 ÷ 9 = 14

2÷2.5+2.5÷2 = 0.8 + 1.25 =2.05

194-64.8÷1.8×0.9 = 194 -36 x0.9 = 194-32.4 = 161.65180-705×6 = 5180 - 4230=950

24÷2.4-2.5×0.8 =10 -2=8

405×(3213-3189) =405x24 = 9720

125×(97-81) =125x16 =2000

6942+480÷3 = 6942 + 160 = 6782

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

6-1.6÷4= 6- 0.4 = 5.6

5.38+7.85-5.37= 13.23 - 5.37=7.86

7.2÷0.8-1.2×5=9 - 6 =3

6-1.19×3-0.43= 6-3.57 - 0.43 = 6- (3.57 + 0.43) = 6-4 = 2

6.5×(4.8-1.2×4)= 6.5 x(4.8 - 4.8 )=6.5 x0 = 0

0.68×1.9+0.32×1.9 = (0.68 + 0.32) x1.9 = 1 x 1.9 = 1.9

10.15-10.75×0.

4-5.7 = 10.15 - 4.

3 - 5.7 = 10.15 -(4.

3 + 5.7)=10.15 - 10 =0.

155.8×(3.87-0.

13)+4.2×3.74 = 5.

8 x 3.74 +4.2 x 3.

74 = (5.8 +4.2)x3.

74 = 10 x 3.74 = 37.4

32.52-(6+9.728÷3.

2)×2.5 = 32.52 - (6+3.

04)x2.5 = 32.52 - 9.

02 x 2.5 = 32.52 -22.

55 = 9.97

(136+64)×(65-345÷23)= 200x(65-15) = 200x 50=10000

10樓:匿名使用者

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 3.416÷(0.016×35) = 3.

416 ÷0.56 = 6.1 0.

8×[(10-6.76)÷1.2] = 0.

8 x(3.24÷1.2) = 0.

8 x 2.7 = 2.16 5.

67×0.2-0.62 = 1.

134-0.62 = 0.514 0.

4×0.7×0.25 = 0.

4 x 0.25 x 0.7 = 0.

1 x 0.7 = 0.07 0.

78+5.436+1 = 6.216 +1 = 7.

216 30.8÷[14-(9.85+1.

07)] = 30.8 ÷ (14 - 10.92) = 30.

8÷3.08 = 10 [60-(9.5+28.

9)]÷0.18 = (60- 38.4)÷0.

18 = 21.6 ÷0.18 = 120 2.

881÷0.43-0.24×3.

5 = 6.7 - 0.24 x3.

5 = 6.7 - 0.84 = 5.

86 20×[(2.44-1.8)÷0.

4+0.15] = 20x (0.64 ÷0.

4 +0.15)= 20x(1.6 +0.

15) = 20 x1.75 = 35 28-(3.4+1.

25×2.4) = 28 - (3.4 + 3) = 28 - 6.

4 = 21.6 2.55×7.

1+2.45×7.1 = (2.

55 + 2.45) x7.1 = 5 x7.

1=35.5 0.8×〔15.

5-(3.21+5.79)〕 = 0.

8 x (15.5 - 9) = 0.8 x 6.

5 = 5.2 (31.8+3.

2×4)÷5 = (31.8 + 12.8)÷5 = 44.

6÷5 = 8.92 31.5×4÷(6+3) = 126 ÷ 9 = 14 2÷2.

5+2.5÷2 = 0.8 + 1.

25 =2.05 194-64.8÷1.

8×0.9 = 194 -36 x0.9 = 194-32.

4 = 161.6 5180-705×6 = 5180 - 4230=950 24÷2.4-2.

5×0.8 =10 -2=8

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