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计算下列各题怎样简便就怎样算 计算下列各题:(1)(+4.3)-(-4)+(-2.3)-(+4

火烧 2021-07-20 17:44:45 1059
计算下列各题:(1)(+4.3)-(-4)+(-2.3)-(+4 计算下列各题:(1)(+4.3)-(-4)+(-2.3)-(+4(1)(+4.3)-(-4)+(-2.3)-(+4)=4.3+4-2.

计算下列各题:(1)(+4.3)-(-4)+(-2.3)-(+4  

计算下列各题:(1)(+4.3)-(-4)+(-2.3)-(+4

(1)(+4.3)-(-4)+(-2.3)-(+4)
=4.3+4-2.3-4
=2;

(2)-4-2×32+(-2×32)
=-4-64-64
=-132;

(3)(-48)÷(-2)3-(-25)×(-4)+(-2)2
=6-100+4
=-90.

计算下列各题:(1)(+4.3)-(-4)+(-2.3)-(+4);(2)(-48)÷(-2)3-(-25)×(-4)+(-2)2

(1)原式=4.3+4-2.3-4
=2;
(2)原式=(-48)÷(-8)-100+4
=6-100+4
=-90;
(3)原式=1÷(-

1 6

)×

1 6

=-1;           
(4)原式=(-1.53+0.53-3.4)×0.75
=-4.4×0.75
=-3.3.

计算下列各题:(1)-27+(-32)+(-8)+27;(2)(+4.3)-(-4)+(-2.3)-(+4);(3)-4-2×32+(-2

(1)-27+(-32)+(-8)+27
=-27-32-8+27
=-40;
(2)(+4.3)-(-4)+(-2.3)-(+4)
=4.3+4-2.3-4
=2;
(3)-4-2×32+(-2×32)
=-4-64-64
=-132;
(4)(-48)÷(-2)3-(-25)×(-4)+(-2)2
=6-100+4
=-90.

计算下列各题:① 0.008 1 1 4 +( 4 - 3 4 ) 2 +( 8 ) -

①原式= (0.3 ) 4×

1 4 +( 2 -

3 2

) 2 +( 2

3 2

) -

4 3

- 2 4 ×(-0.75) =0.3+2 -3 +2 -2 -2 -3 =0.3+0.25=0.55
②原式= l g 2 5+2lg2lg5+l g 2 2+ 2 1 ? 2

1 2

log 2 5 = (lg5+lg2 ) 2 + 2 1 ? 2 log 2

5

=1+2

5

所以①的值为:0.55.②的值为: 1+2

5

计算下列各题(1)(-3.6)+(+2.5);(2)(-4

(1)原式=-3.6+2.5=-1.1;
(2)原式=-49+91-51-9=-18;
(3)原式=3

1 2

+

1 3

+2

2 3

-

1 2

=3+3=6;
(4)原式=1-2+5-5=-1.

计算下列各题:(1)?0.52+14?|?22?4|?

(1)?0.52+

1 4

?|?22?4|?(?1

1 2

)3×

4 9

=-

1 4

+

1 4

-8+

3 2

=-6.5;
(2)?1

2 3

÷

3 4

×(?0.6)×1

3 4

+(?2)3.
=

5 3

×

4 3

×

3 5

×

7 4

-8
=?

17 3

计算下列各题:(1) 0.008 1 1 4 +( 4 - 3 4 ) 2 +(8 ) - 4 3

(1)原式 0.008 1

1 4 + ( 4 -

3 4

) 2 + (8) -

4 3

-1 6 -0.75
= (0.3)4×

1 4

+ ( 2 -

3 2

) 2 + (2 3 ) -

计算下列各题怎样简便就怎样算 计算下列各题:(1)(+4.3)-(-4)+(-2.3)-(+4
4 3

- 2 -4×0.75
=

3 10

+

1 8

+

1 16

-

1 8

=

29 80

.(5分)
(2)原式lg 2 5+lg2lg50
=lg 2 5+2lg2lg5+lg 2 5
=(lg2+lg5) 2
=1                   (5分)

计算下列各题:(1)计算0.008114+(4?34)+(8)?43

(1)原式=(0.3)4×

1 4

+22×(?

3 4

)+2

3 2

×(?

4 3

)?24×(?

3 4

)
=0.3+2-3+2-2-2-3=0.3+0.25=0.55.
(2)原式=lg25+2lg2lg5+lg22+2?2log25=(lg2+lg5)2+2×5=1+10=11.

  
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