(1)762﹣357+438﹣243 =(762+438)﹣(357+243) =1200﹣600 =600 |
(2)(+﹣) =(+﹣)×36 =×36+×36﹣×36 =18 |
(3)(200.6×365+2006×63.5)×40% =(200.6×365+200.6×635)×40% =(365+635)×200.6×40% =1000×200.6×0.4 =200600×0.4 =80240 |
(4) =(4+)×5+(32+)×+0.25×4×31 =4×5+×5+32×+×+1×31 =60 |
(5)(0.5++÷1.25)÷(﹣1.25×) =(0.5++2.5)÷(﹣2) =(0.5+2.5+)÷(﹣2) =(3)÷3 =1 |
(6) =(1﹣)+(﹣)+(﹣)+…+(﹣) =1﹣+﹣+﹣+…﹣+﹣ =1﹣ = |