450-140= | 25÷7= | 900+238= | 600-9×8= |
90-7×5= | 26+30-28= | 48÷(2+4)= | 780-772= |
26+24= | 80-30= | 78-26= | = |
= | 0.25×2.69×4= | 10-2.87-7.13= | ÷24= |
3÷= | 0.87-0.49 | 4.9×0.7= | = |
= | = | = | = |
(25+4)×4= | 12.37-3.25-6.75= | 3/14×6= | 0.51÷17= |
14-7.4= | 5.2÷1.3= | 25×12= | = |
= | 2.5-2= | 36-29= | 120÷4= |
300+25= | 630-30= | 4×50= | 15.9+10.8= |
26×13= | 24÷4+56÷4= | 8-2.5= | 12×2.5= |
2吨50千克=________吨. |
解方程
×(x+0.5)=75% | 40%X-= | 2X+40%X=7.2. |