四年级上册数学竖式计算题500道

2024-11-27 17:32:19
推荐回答(5个)
回答1:

1、30-(3.8+0.75)

此题主要利用加法结合律和分配律,先把3.8变换成(4-0.2),0.75变换成(1-0.25),再利用加法交换律,先算整数,再算小数,最后利用加法结合律,去掉括号运算。

30-(3.8+0.75)

=30-[(4-0.2)+(1-0.25)]

=30-[(4+1)-(0.2+0.25)]

=30-(5-0.45)

=30-5+0.45

=25.45

2、0.9+9.9+99.9+999.9+9999.9

此题先找规律,5个数都差0.1可凑整,先利用凑整法变换一下,再利用加法结合律(a+b)+c=a+(b+c),来进行简便计算。

0.9+9.9+99.9+999.9+9999.9

=(1-0.1)+(10-0.1)+(100-0.1)+(1000-0.1)+(10000-0.1)

=1+10+100+1000+10000-0.1×5

=11111-0.5

=11110.5

3、21÷3.5+21÷1.5

此题先利用拆分法将3.5转换成7÷0.5,将1.5转换成3÷0.5,再用凑整法先计算整数除法,再计算小数除法,使得运算简便。

21÷3.5+21÷1.5

=21÷7÷0.5+21÷3÷0.5

=3÷0.5+7÷0.5

=6+14

=20

4、50×49×2

此题运用乘法交换律:a×b=b×a,交换3个数的位置,先计算50×2,再跟49相乘,使得运算简便。

50×49×2

=50×2×49

=100×49

=4900

5、24.6-3.98+5.4-6.02

此题利用加法交换结合律,凑整再计算。步骤如下:

24.6-3.98+5.4-6.02

=(24.6+5.4)-(3.98+6.02)

=30-10

=20

6、528-99

利用凑整法和减法结合律计算,先利用凑整法把99变换为(100-1),再运用a-b-c=a-(b+c)来简便计算,步骤如下:

528-99

=528-(100-1)

=528-100+1

=428+1

=429

回答2:

825÷32=
336÷63=
932×44=
652×39=
886÷23=
288÷32=
66×123=
912×67=
644÷28=
432÷26=
45×193=
365×55=
728÷56=
540÷12=
693×22=
563×18=
7200÷900=
960÷80=
523×79=
156×92=

回答3:

825÷32=
336÷63=
932×44=
652×39=
886÷23=
288÷32=
66×123=
912×67=
644÷28=
432÷26=
45×193=
365×55=
728÷56=
540÷12=
693×22=
563×18=
7200÷900=
960÷80=
523×79=
156×92=
65100÷210=
9100÷700=

回答4:

四年级上册数学竖式计算题540题

——每天一练提升孩子的计算能力

1.巩固与复习(一) 

809×2=                 674×4=               547×7=                   293×8=  

504÷9=                102÷6=                18×79=                   101×91=   

91×75=                 735÷9=               524×6=                     68÷4=

……

4. 三位数乘两位数(一)

 135×5=                8×312=              312×25=                        234×46= 

325×65=               321×19=            7×210=                       523×79=

 156×92=               562×45=           325×71=                       145×75=  

5. 三位数乘两位数(二)

126×89=              307×46=               136×15=                  356×50=

35×126=              108×6=                 203×32=                   54×312=

215×36=             245×36=                235×12=                   356×62=    

……

14 除数是两位数的除法(一)

92÷30=             178÷30=                   140÷20=                    280÷50=


565÷80=            324÷40=                   230÷40=                   250÷30=


420÷50=            84÷21=                     430÷62=                   96÷32=

……

24.综合练习(一)

825÷32=             336÷63=                932×44=                 652×39=


886÷23=             288÷32=                66×123=                 912×67=


644÷28=             432÷26=                45×193=                 365×55=

……

这里篇幅有限,完整清晰打印版请见百度文库:

四年级上册数学竖式计算题540题

回答5:

1、420×78=
685×63=
234×97=
437÷23=
304÷38=
2、707×51
202×80=
792÷44=
594÷11=
125×80=
3、204×86=
322÷14=
930×97=
506×25=
266÷19=
4、817×39=
405×74=
177×54=
1960÷28=
330÷22=
5、345÷15=
803×14=
125×25=
336÷42=
843×69=
6、612×19=
538×82=
288÷16=
2471÷13=
806×25=

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