Question

四年级简便计算带答案

四年级简便计算带答案

Answer 1

第一类：加

65+73+135 357+288+143 272+68+28
=65+135+73 =357+143+288 =272+28+68
=200+73 =500+288
=300+68
=273 =788 =368

129+235+171+165 17+145+23+35 999+99+9+3
=129+171+235+165 =17+23+145+35 =999+1+99+1+9+1
=300+400 =40+180 =1000+100+10
=700 =220 =1110
第二类：减

400-256-44 517-53-47 284-159-41
=400-
（
256+44
）
=517-(53+47) =284-(159+41)
=400-300 =517-100 =284-200
=100 =417 =84

258-42-16 545-167-145 478-47-178
=258-(42+16) =545-145-167 =478-178-47
=258-58 =400-167 =300-47
=200 =233 =253

344-
（
144+37
）
236-
（
177+36
）

=344-144-37
=236-177-36
=200-37 =236-36-177
=163 =200-177
=23

第三类：乘

8×（125×13）

（250×125）×（4×8）

=
8×125×13
=
250×125×4×8

=1000
×
13 =250
×
4
×
125
×
8
=13000 =1000
×
1000
=1000000

88×125

72×125

125×64×25

=11
×
8
×
125 =9
×
8
×
125 =125
×
8
×
2
×
4
×
25
=11
×
1000 =9
×
1000 =1000
×
2
×
100
=11000 =9000 =200000

42×125×8×5

25×4×88×125

=42
×
5
×
125
×
8 =25
×
4
×
11
×
8
×
125
=210
×
1000 =100
×
11
×
1000
=210000 =1100000