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= |
摆一摆,算一算.
|
(1)33 -17= |
(2)54 -45= |
(3)82 -26= |
直接写得数.
|
(1) |
(2) |
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= |
摆一摆,算一算.
|
(1)33 -17= |
(2)54 -45= |
(3)82 -26= |
直接写得数.
|
(1) |
(2) |