简便方法:请用奥数解下面各题:1÷32÷0.05÷0.25÷0.5 0.25×5.6+2.25×3.61.25×5.6+2.25×3.6

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/27 23:51:20
简便方法:请用奥数解下面各题:1÷32÷0.05÷0.25÷0.5 0.25×5.6+2.25×3.61.25×5.6+2.25×3.6

简便方法:请用奥数解下面各题:1÷32÷0.05÷0.25÷0.5 0.25×5.6+2.25×3.61.25×5.6+2.25×3.6
简便方法:请用奥数解下面各题:
1÷32÷0.05÷0.25÷0.5 0.25×5.6+2.25×3.6
1.25×5.6+2.25×3.6

简便方法:请用奥数解下面各题:1÷32÷0.05÷0.25÷0.5 0.25×5.6+2.25×3.61.25×5.6+2.25×3.6
1÷32÷0.05÷0.25÷0.5
=1÷(2×4×4×0.05×0.25×0.5)
=1÷[(2×0.05)×(4×0.25)×(4×0.5)]
=1÷(0.1×1×2)
=1÷0.2
=5
0.25×5.6+2.25×3.6
=0.25×4×1.4+2×3.6+0.25×3.6
=1.4+7.2+0.25×4×0.9
=8.6+0.9
=9.5
1.25×5.6+2.25×3.6
=1.25×0.8×7+2.25×4×0.9
=1×7+9×0.9
=7+8.1
=15.1