求最简整数比
3/4dm:5m
=7.5m:5m
=(7.5×10):(5×10))……………前项和后项同时扩大10倍把小数变成整数
=75:5
=15:1
0.8m:5/7dm
=8dm:5/7dm……………前项和后项同时扩大7倍,把分母7去掉。
=(8×7):(5/7×7)
=35:5
=7:5
3/4:5/6
=(3/4×12):(5/6×12)……………前项和后项同时扩大12倍把分母4和6去掉。
=9:10
0.7:0.85
=(0.7×100):(0.85×100)……………前项和后项同时扩大100倍把小数变成整数。
=70:85
=14:17
求比值
4/5吨:5:8千克……………把单位换成相同的单位;
=800÷5.8
=8000/58
=4000/29
0.8m:5/7am
=80÷5/7
=80×7/5
=112
3/4:5/6
=3/4÷5/6
=3/4×6/5
=9/10
0.7:0.85
=0.7÷0.85
=70/85
=14/17
你好像没说清楚问题