Question

-0.5-(-3又4分之1)+2.75-7又2分之1等于多少？

-0.5-(-3又4分之1)+2.75-7又2分之1等于多少？
-1又2分之1×7分之5-（-7分之5）×2又2分之1+（-2分之1）×5分之7等于多少？回答了给高分

Answer 1

-0.5-(-3又4分之1)+2.75-7又2分之1
=-0.5+3.25+2.75-7.5
=-8+6
=-2

-1又2分之1×7分之5-（-7分之5）×2又2分之1+（-2分之1）×5分之7
=-3/2x5/4+5/7x5/2-1/2x5/7
=5/7x(-3/2+5/2-1/2)
=5/7x1/2
=5/14

Answer 2

-0.5-(-3又4分之1)+2.75-7又2分之1
=-0.5+3.25+2.75-7.5
=6-8
=-2
-1又2分之1×7分之5-（-7分之5）×2又2分之1+（-2分之1）×5分之7
=5/7*(-1.5+2.5)-5/14
=5/7-5/14
=5/14

Answer 3

-0.5-(-3又4分之1)+2.75-7又2分之1
=-0.5+3.25+2.75-7.5
=-8+6
=-2
shiduid e

Answer 4

-2
70分之1