竖式计算0.38×0.25150×0.120.87×1.9(得数保留二位小数)8.5×0.39(验算)
0.38×0.25=0.095
0.38
×0.25 190
,76 0.0950
150×0.12=18
1 50
×0.12 300
,150 18.00
0.87×1.9≈1.65
0.87
×1.9 783
,87 1.653
8.5×0.39=3.315
8.5
×0.39 765
,255 3.315
验算:
0.3 9
×8.5 195
,312 3.315
竖式计算0.38×0.25150×0.120.87×1.9(得数保留二位小数)8.5×0.39(验算)
0.38×0.25=0.095
0.38
×0.25 190
,76 0.0950
150×0.12=18
1 50
×0.12 300
,150 18.00
0.87×1.9≈1.65
0.87
×1.9 783
,87 1.653
8.5×0.39=3.315
8.5
×0.39 765
,255 3.315
验算:
0.3 9
×8.5 195
,312 3.315