17.34÷0.45-3.86÷0.1和0.31×4.6+0.44×3.1+0.31这两道怎么简算(先说可否简算,如果能,就把过程写出来
问题描述:
17.34÷0.45-3.86÷0.1和0.31×4.6+0.44×3.1+0.31这两道怎么简算(先说可否简算,如果能,就把过程写出来
答
17.34÷0.45-3.86÷0.1(不能)
=38.6-38.6
=0
0.31×4.6+0.44×3.1+0.31(能)
=0.31×4.6+4.4×0.31+0.31
=0.31×(4.6+4.4+1)
=0.31×10
=3.1