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五年级脱式计算简便运算的题 脱式计算下面各题(能简算的要用简便方法计算,并写出简算过程). 450÷18×25+173. 670+65÷

火烧 2021-06-27 01:22:21 1175
脱式计算下面各题(能简算的要用简便方法计算,并写出简算过程). 450÷18×25+173. 670+65÷ 脱式计算下面各题(能简算的要用简便方法计算,并写出简算过程). 450÷18×25+173

脱式计算下面各题(能简算的要用简便方法计算,并写出简算过程). 450÷18×25+173. 670+65÷  

脱式计算下面各题(能简算的要用简便方法计算,并写出简算过程). 450÷18×25+173. 670+65÷

(1)450÷18×25+173,
=25×25+173,
=625+173,
=798;

(2)670+65÷3×

3 5


=670+65×(

1 3

×

3 5

),
=670+65×

1 5


=670+13,
=683;

(3)

5 8

-

1 6

×

4 5

+57,
=

5 8

-

2 15

+57,
=

59 120

+57,
=57

59 120

(4)38-12×6÷16,
=38-72÷16,
=38-4.5,
=33.5.

脱式计算下面各题(能简算的要用简便方法计算,并写出简算过程). (84×27-2166)÷17 115×3.

①(84×27-2166)÷17,
=(2268-2166)÷17,
=102÷17,
=6;

11 5

×3.7+5.3÷

5 11

+2.2,
=2.2×3.7+5.3×2.2+2.2,
=2.2×(3.7+5.3+1),
=2.2×10,
=22;

③(0.75÷3-0.1)×(1-

2 3

),
=(0.25-0.1)×

1 3


=0.15×

1 3


=0.05.

计算下面各题,能简算的要用简便方法计算。

80-12×4÷3 = 80 - 4×(12÷3)= 80 - 4×4 = 80 - 16 = 64
60+180÷20-5 = 60 + 9 - 5 = 64
4.5-(2.68+0.86)=4.5 -(2.7-0.02+0.8+0.06)=4.5 -(3.5+0.04)= 4.5 - 3.5 - 0.04 =0.96
15.37-2.8-2.2 = 15.37 - (2.8+2.2)=15.37 - 5 = 10.37
19.92+10.35-9.92 =10.35 + (19.92 - 9.92)=10.35 + 10 = 20.35
42×4×25 = 42×(4×25)= 42 ×100 = 4200

计算下面各题,能简算的要用简便方法计算18×(56+59) ...

(1)18×(

5 6

+

5 9

)
=18×

5 6

+18×

5 9

=15+10
=25;

(2)28.9×25+25×71.1
=(28.9+71.1)×25
=100×25
=2500;

(3)20-

2 3

÷

2 54

?

1 6

=20-18?

1 6

=2?

1 6

=1

5 6

(4)

8 15

÷[(

1 2

-

1 3

)×

4 15

]
=

8 15

÷[

1 6

×

4 15

]
=

8 15

÷

2 45

=12.

计算下面各题(能简算的要简算,并写出简算过程)6.64+0.22+9.78+3.3675.1+24.19-75.1+24.1936900÷

(1)6.64+0.22+9.78+3.36
=(6.64+3.36)+(0.22+9.78)
=10+10
=20;

五年级脱式计算简便运算的题 脱式计算下面各题(能简算的要用简便方法计算,并写出简算过程). 450÷18×25+173. 670+65÷

(2)75.1+24.19-75.1+24.19
=(75.1-75.1)+(24.19+24.19)
=0+48.38
=48.38;

(3)36900÷(2060-1910)+60
=36900÷150+60
=246+60
=306;

(4)248×6+274÷137
=1488+2
=1490.

计算下面各题,能简算的要写出简算过程9.9╳8.4+0.84

解: 9.9*8.4+0.84
=9.9*8.4+8.4*0.1
=(9.9+0.1)*8.4
=10*8.4
=84

计算下面各题,能简算的要写出简算过程7.85-0.4-0.54

能简算的要写出简算过程
7.85-0.46-0.54
=7.85-(0.46+0.54)
=7.85-1
=6.85

计算下面各题,能简算的要写出简算过程。(12分)  ...

22.6,  31,  10 , 2.5

计算下面各题,能简算的要写出简算过程0.5╳[(147-74.2)÷0.91]

=0.5x(72.8/0.91)
=0.5x80
=40
望采纳

计算下面各题,能简算的要用简便方法计算.23.4-5.7-4.3 25×50×32 &...

(1)23.4-5.7-4.3
=23.4-(5.7+4.3)
=23.4-10
=13.4

(2)25×50×32
=25×50×4×8
=(25×4)×(50×8)
=100×400
=40000

(3)99×48+48
=(99+1)×48
=100×48
=4800

(4)46×16+16×54
=16×(46+54)
=16×100
=1600

(5)65×102
=65×(100+2)
=65×100+65×2
=6500+130
=6630

(6)14.9+3.7+5.1+6.3
=(14.9+5.1)+(3.7+6.3)
=20+10
=30.

  
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