遞等式計算,能簡便的要簡便 4

2021-04-17 20:09:37 字數 3901 閱讀 5863

1樓:葉聲紐

(4/25)×99+(4/25)

=(4/25)×(99+1)

=(4×25)×100

=4×4

=16.

2樓:回憶七彩的童年

(99+1)x4/25

3樓:匿名使用者

4/25*100即100個4/25

4樓:

(1)25×

32×0.25

=25×4×2×4×0.25

=(25×4)版×(4×0.25)×2

=100×1×2

=200;

(2)0.25×(0.4+40)

=0.25×0.4+40×0.25

=0.1+10

=10.1;

(3)0.67+1.28+9.33+0.72=(0.67+9.33)+(1.28+0.72)=10+2

=12;

(4)3.18-(0.33+1.18)

=3.18-0.33-1.18

=(3.18-1.18)-0.33

=2-0.33

=1.67;

(5)6.3÷35

=6.3÷(7×5)

=(6.3÷7)÷權5

=0.9÷5

=0.18;

(6)[1-(0.5-0.25)]×0.6=[1-0.25]×0.6

=0.75×0.6

=0.45;

(7)7.8×0.9+0.78

=0.78×9+0.78

=0.78×(9+1)

=0.78×10

=7.8;

(8)1.9-1.9×(1.9-1.9)

=1.9-1.9×0

=1.9-0

=1.9.

遞等式計算(能簡便的要簡便) (8分之5+6分之5)*25分之4

5樓:巨集哥

(5/8+5/6)×

4/25

=5/8×4/25+5/6×4/25

=1/10+2/15

=7/30

3/5x=25/72

解專:x=25/72÷屬3/5

x=125/216

x÷6/35=26/35÷13/25

解: x=10/7×6/35

x=12/49

4x+16-2x=26

解: 2x=26-16

x=10÷2x=5

6樓:匿名使用者

遞等式計算(能簡便的要簡便)

(8分之

5+6分之5)*25分之4

[(5/8)+(5/6)]*(4/25)

解,得:專

==(5/8)(4/25)+(5/6)(4/25)==(1/10)+(2/15)

==7/30

解方程:

5分之屬3x=72分之25

3x/5==25/72

解,得:

72*3x==5*25

x=5*25/(72*3)

x==125/216

x÷35分之6=35分之26÷25分之13x/(6/35)==(26/35)/(13/25)解,得:

35x/6==10/7

x==(10/7)*(6/35)

x==12/49

4x+2(8-x)=26

解,得:

4x+16-2x-26==0

2x==10

x==5

遞等式計算,能簡便計算的一定要簡便計算.25×40.1 12.5×3.2 100.98÷9 (0.25+0.25+0.25)×4

7樓:手機使用者

(1)25×40.1

=25×(zhi40+0.1),

dao=25×40+25×0.1,

=100+2.5,

=102.5;專

(2)12.5×3.2

=12.5×0.8×4,

=10×4,

=40;

(3)100.98÷9

=(99+1.98)÷9.屬

=99÷9+1.98÷9,

=11+0.22,

=11.22;

(4)(0.25+0.25+0.25)×4=3×(0.25×4),

=3×1,

=3;(5)5.64÷2.5÷0.4

=5.64÷(2.5×0.4),

=5.64÷1,

=5.64.

遞等式計算,能簡便的要簡便

8樓:★魯魯修

(1)25×32×0.25

=25×4×2×4×0.25

=(25×4)×(4×0.25)×2

=100×1×2

=200;

(2)0.25×(0.4+40)

=0.25×0.4+40×0.25

=0.1+10

=10.1;

(3)0.67+1.28+9.33+0.72=(0.67+9.33)+(1.28+0.72)=10+2

=12;

(4)3.18-(0.33+1.18)

=3.18-0.33-1.18

=(3.18-1.18)-0.33

=2-0.33

=1.67;

(5)6.3÷35

=6.3÷(7×5)

=(6.3÷7)÷5

=0.9÷5

=0.18;

(6)[1-(0.5-0.25)]×0.6=[1-0.25]×0.6

=0.75×0.6

=0.45;

(7)7.8×0.9+0.78

=0.78×9+0.78

=0.78×(9+1)

=0.78×10

=7.8;

(8)1.9-1.9×(1.9-1.9)

=1.9-1.9×0

=1.9-0

=1.9.

遞等式計算,能簡便計算的一定要簡便計算.25×40.1 12.5×3.2 100.d8÷d (0.25+0.25+0.2

9樓:鄭雨328丶

(1)25×45.1

=25×(45+5.1),

=25×45+25×5.1,

=155+2.5,

=152.5;

(2)12.5×手.2

=12.5×5.8×4,

=15×4,

=45;

(手)155.t8÷t

=(tt+1.t8)÷t.

=tt÷t+1.t8÷t,

=11+5.22,

=11.22;

(4)(5.25+5.25+5.25)×4=手×(5.25×4),

=手×1,

=手;(5)5.84÷2.5÷5.4

=5.84÷(2.5×5.4),

=5.84÷1,

=5.84.

遞等式計算,能簡便的要簡便計算:25x(40+8)x125

10樓:寶寶

解:原式=25x40x125+25x8x125=1000x125+25x1000

=125000+25000

=150000

分析:主要考察結合律的運用。

11樓:t夏涼

25x(40十8)x125

=25x40x125十25x(8x125)=1000x125十25x1000

=1000x(125十25)

=1000x150

=150000

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