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
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;
(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
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 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
÷
3 4×(?0.6)×1
3 4+(?2)3.
=
×
4 3×
3 5×
7 4-8
=?
.
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×
+ ( 2 -
3 2) 2 + (2 3 ) -

4 3
- 2 -4×0.75
=
+
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.