口算.
72÷9= | 56÷7= | 69+27= | 180+60= | 4×6+5= |
30÷6= | 60+34= | 80-24= | 19+200= | 6×7-3= |
解方程.(第3、4题写出验算的过程)
(1)x÷6.5=3.2 | (2)6x+18=48 | (3)5.4x+x=12.8 | (4)3(x+2.1)=10.5. |
72÷9= | 56÷7= | 69+27= | 180+60= | 4×6+5= |
30÷6= | 60+34= | 80-24= | 19+200= | 6×7-3= |
(1)x÷6.5=3.2 | (2)6x+18=48 | (3)5.4x+x=12.8 | (4)3(x+2.1)=10.5. |