算一算.
|
(1)63 -3-20= |
(2)90 -40-30= |
|
(3)78 -(54-36)= |
算一算.
|
(1)66 -(13+20)= |
(2)17 +(16+9)= |
算一算.
|
(1)36 +6+50= |
(2)5 +49+20= |
怎样算简便就怎样算.
|
(1)27 +35+20= |
(2)18 +40+29= |
列竖式计算.
|
(1)64 -56= |
(2)43 +37= |
|
(3)94 -28-49= |
(4)73 -58+66= |