怎样简便怎样算
15×42﹣1308÷2 8.4﹣9.1÷1.3+5.8 4.7×68+53×6.8
2013×
÷8+
÷
+1÷8 7.1﹣0.45×(6.28+3.52)
怎样简便怎样算
15×42﹣1308÷2 8.4﹣9.1÷1.3+5.8 4.7×68+53×6.8
2013×
÷8+
÷
+1÷8 7.1﹣0.45×(6.28+3.52)