計算,怎樣簡便就怎樣算
(1)315×156×38        
(2)252528×4
(3)710÷10+710               
(4)( 29+227 )×27
(5)157×5.6+45                 
(6)35×1310×31721.
(1)315×156×38,
=315×156×2×19,
=315×2×156×19,
=630×156×19,
=98280×19,
=1867320;

(2)252528×4,
=(250000+2500+20+8)×4,
=250000×4+2500×4+20×4+8×4,
=1000000+10000+80+32,
=1010112;

(3)710÷10+710,
=71+710,
=781;

(4)(29+227)×27,
=(250+6)×27,
=250×27+6×27,
=6750+162,
=6912;

(5)157×5.6+45,
=(100+57)×5.6+45,
=100×5.6+57×5.6+45,
=560+319.2+45,
=924.2;

(6)35×1310×31721,
=5×7×1310×31721,
=(5×1310)×(7×31721),
=6550×222047,
=1454407850.
練習冊系列答案
相關習題

科目:小學數(shù)學 來源: 題型:

用遞等式計算(怎樣簡便就怎樣計算).
0.25×5×1.6            
4.28+4.72×2.5
3.14×5.5+0.314×45     19.72×101-19.72
3.7×4.85+16.07         (0.718+0.718+0.718+0.718)×0.25.

查看答案和解析>>

科目:小學數(shù)學 來源: 題型:

用遞等式計算(怎樣簡便就怎樣計算).
5.6×0.85×7.8       
4.32×99+4.32 99×3.74             
1.25×3.2×0.25 1.2×2.6+3×4.25     1.25×7.2.

查看答案和解析>>

科目:小學數(shù)學 來源: 題型:

(2011?鹽亭縣)脫式計算,怎樣簡便就怎樣算
(
1
2
-
1
4
1
3
+
1
6

3
4
÷
9
10
-
5
14
×
7
15

8
9
×[
3
4
-(
7
16
-
1
4
)]

④102×
98
101

4
5
-
5
9
+
1
5
-
4
9

8
13
÷7+
1
7
×
5
13

查看答案和解析>>

科目:小學數(shù)學 來源: 題型:

用遞等式計算(怎樣簡便就怎樣計算).
5.4+[8×(6.34-3.59)]0.95×10.1 10.48+22.56÷4.7×5.4    4.6÷(0.23×2.5)

查看答案和解析>>

科目:小學數(shù)學 來源: 題型:

計算(怎樣簡便就怎樣算)
1
3
×
3
5
÷
1
3
×
3
5
=
3
4
×6.7+4.3×0.75-75%
=
(
7
10
+
5
6
-
4
5
)×30
=
[1-(
1
2
-
1
4
)] ×
2
3
1
4
1
6
=
1
8
:x
x+
1
4
x=60.

查看答案和解析>>

同步練習冊答案