2.把下列各题写成省略加号的形式并填在横线上
(1)(-12)-(+8)+(-6)-(-5)=-12-8-6+5.
(2)(+3.7)-(-2.1)-1.8+(-1.1)=3.7+2.1-1.8-1.1.
(1)(-12)-(+8)+(-6)-(-5)=-12-8-6+5.
(2)(+3.7)-(-2.1)-1.8+(-1.1)=3.7+2.1-1.8-1.1.
17.填表
0 160401 160409 160415 160419 160425 160427 160431 160437 160439 160445 160451 160455 160457 160461 160467 160469 160475 160479 160481 160485 160487 160491 160493 160495 160496 160497 160499 160500 160501 160503 160505 160509 160511 160515 160517 160521 160527 160529 160535 160539 160541 160545 160551 160557 160559 160565 160569 160571 160577 160581 160587 160595 199269
半径/cm | 直径/cm | 周长/cm | 面积/cm2 | |
圆 | 4 | |||
5 | ||||
31.4 |