我口算快又准.
| 45+32= | 84-21= | 3×9= | 1000-400= |
| 5×6= | 59+41= | 60+25= | 200÷2= |
| 700+200= | 24÷4= | 80-(35-15)= | (12+36)÷6= |
| 4×7+2= | 27÷5= |
| 45+32= | 84-21= | 3×9= | 1000-400= |
| 5×6= | 59+41= | 60+25= | 200÷2= |
| 700+200= | 24÷4= | 80-(35-15)= | (12+36)÷6= |
| 4×7+2= | 27÷5= |