簡單-"maths

3.50m(correct to nearest cm)

= 3.50 x 100 = 350cm


2.50kg(correct to nearest g)

= 2.5 x 1000 = 2500g


0.0010(correct to 2 sig.fig.)

= 0.0010

1. 3.50m (correct to nearest cm)
=(3.5 x100)cm
=350cm

2. 2.50kg (correct to nearest g)
=(2.5 x1000)kg
=2500 m


FYI
1m=100cm
1cm=10mm

1kg=1000g

1l =1000ml



3. 0.0010
= 0.0010 (correct to 2 sig.fig.)


FYI,

after sig,fig., "0" is included,so you must court it in to 1.
e.g: 0.006000
=4 sig.fig.




ADD oli!!!

= 3.50 x 100 = 350cm

= 2.5 x 1000 = 2500g

4
3
0.0010

..........

3.50m(correct to nearest cm)

=350cm

2.50kg(correct to nearest g)

=2500g

0.0010(correct to 2 sig.fig.)

=0.0010  

350cm
2500g
最尾果個唔識-v-

350cm
2500g
1

2007-12-08 22:23:11 補充：
sorry,錯咗最後一條係0.0010