【1】(0.75+0.2)÷0.25×3【2】1/6÷【1÷（3/5-3/10）】
问题描述：
【1】(0.75+0.2)÷0.25×3【2】1/6÷【1÷（3/5-3/10）】
答
1...（0.75+0.2)÷0.25×3=0.95÷0.25×3=3.8X3=10.4
2...1/6÷【1÷（3/5-3/10）】=1/6÷【1÷（6/10-3/10）】=1/6÷（1÷3/10）
=1/6÷10/3
=1/6X3/10
=1/20
答
(0.75+0.2)÷0.25×3
=0.95÷0.25×3
=3.8×3
=11.4
1/6÷【1÷（3/5-3/10）】
=1/6÷(1÷3/10)
=1/6÷10/3
=1/6×3/10
=1/20
答
1】(0.75+0.2)÷0.25×3
=0.95×4×3
=3.8×3
=11.4
【2】1/6÷【1÷（3/5-3/10）】
=1/6÷(1-3/10)
=1/6÷7/10
=1/6×10/7
x=5/21