混合运算
3.14×42+27.3× | 18.84×100-12.5×32. |
脱式计算,能简算的要简算:
2+4.6+4+5.4 | 3×2-2×3 |
85×1+2.5÷4 | 1÷[(4-0.005×700)÷1]. |
解方程:
①÷=x: | ②3x+x=. |
在横线里填上合适的数,使各题能用简便方法计算.
10--________ | (+)×________ | ××________ | ÷________+× |
3.14×42+27.3× | 18.84×100-12.5×32. |
2+4.6+4+5.4 | 3×2-2×3 |
85×1+2.5÷4 | 1÷[(4-0.005×700)÷1]. |
①÷=x: | ②3x+x=. |
10--________ | (+)×________ | ××________ | ÷________+× |