Question

求解数学 感谢

Answer 1

1 .73÷4+0.25×26+1/4
=73/4+1/4×26+1/4
=73/4+26/4+1/4
=100/4
=25
2.(1/3×2+1/2÷2) ×1 1/2
=(2/3+1/2×1/2) ×3/2
=(2/3+1/4) ×3/2
=(8/12+3/12) ×3/2
=11/12×3/2
=33/8
3. 0.24÷5/25+0.24×5 5/2
=0.24÷0.2+0.24×15/2
=0.12+0.12×15=0.12+1.8=1.92

4. 2-[1-(5/7+3/14÷3/4)]3/7
= 2-[1-(5/7+3/14×4/3)]3/7
=2-[1-(5/7+2/7)]3/7
=2-[1-7/7]3/7
=2-0×3/7
=2-0=2

Answer 2

1568÷（1000-1000×20%）=1.96元

不加工的蔬菜的单价：1.96÷（1+40%）=1.4元

比加工后少：1568-1.4×1000=168元

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疯子？