一道减法算式中,被减数、减数与差加起来是30,被减数是 .
计算:9998+998+99+9+6= .
6+6+2+6+4= × = 18﹣6﹣6﹣6=18﹣6× = .
2.1×5.1×159.1÷0.7÷1.7÷3.7= .
0.0485×2500+485×0.24+51×4.85= .
计算:12.34×56.78+876.6×5.678= .