可以帮我检查签案 有点不明白.... 如果可以的话, 请加上过程+解释, 谢谢!
4.
(a)1cm:160m
10cm:1600m
answer:1.6km
(b)1cm:160m
6cm:960m
answer:0.96km
(c)1.6km×0.96km=1.536km²
5.
5cm:4km
5cm×12/5:4km×12/5
12cm:9.6km
answer:9.6km
6.
1:300
6cm:1800cm
panjang=18m
4.5cm:1350cm
lebar=13.5m
1.
1cm²=1cm×1cm
1cm:5km
5km×5km=25km²
answer:25km²
2.
5cm²:125km²
1cm²:25km²
1cm×1cm:5km×5km
answer:1cm:5km
3.
2cm:8m
3cm²=1cm×3cm
1cm:4m
3cm:12m
4m×12m=48m²
answer:48m²
60m²=1m×60m
2cm:12m
1cm:6m
1m:600m
60m:36000m
0.6km×36km=21.6km²
answer:21.6km²
如有错误，还请告知。谢谢。
