竖式计算.
|
(1)90 -32= |
(2)51 -15= |
(3)79 -70= |
(4)70 -35= |
竖式计算.
|
(1)86 -21= |
(2)72 -46= |
(3)55 -36= |
(4)33 -29= |
推算.
|
(1)56 +4= |
(2)63 +7= |
(3)78 +2= |
|
(4)86 +4= |
(5)93 +7= |
(6)98 +2= |
推算.
|
(1)6 +4= |
(2)3 +7= |
|
(3)8+2= |
(4)16+4= |
回到整十数.
|
(1)23 -( )=20 |
(2)78 -( )=70 |
|
(3)31 -( )=30 |
(4)86 -( )=80 |
|
(5)59 -( )=50 |
(6)98 -( )=90 |
找邻数.
|
(1)45 -1= |
(2)51 -1= |
(3)27 +1= |
(4)99 +1= |
|
45 +1= |
51 +1= |
27 -1= |
99 -1= |
计算
|
(1)98 ×14+86 |
(2)1652 ÷(892-864) |
|
(3)245 +(455+122)+778 |
列竖式计算
(打*的要验算):|
(1)66 ×74= |
(2)45 ×607= |
| (3)*2496÷52= |
计算:
|
(1)10 ×125-2×125 |
(2)478 -240-60 |
|
(3)630 -297+3 |
(4)96 +4×252 |
|
(5)374 +178+126 |
(6)450 -350÷50 |