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一、口算。
$0.05×8=$
$20×0.06=$
$0.81×0.3=$
$3.5×0.6=$
$0.3×3.4=$
$7.5×0.4=$
$4×0.15=$
$2.5×0.05=$
$0.4×2.6=$
$0.26×20=$
$0.17×0.4=$
$1.5×0.3=$
$1.02×0.2=$
$1.25×0.08=$
$3.25×10=$
$1.05×4=$
$2.05×3=$
$0.26×5=$
$2.8×0.5=$
$0.35×0.2=$
$2.5×0.6=$
$8×0.15=$
$0.33×0.5=$
$0.81×0.4=$
$0.05×8=$
0.4
$20×0.06=$
1.2
$0.81×0.3=$
0.243
$3.5×0.6=$
2.1
$0.3×3.4=$
1.02
$7.5×0.4=$
3
$4×0.15=$
0.6
$2.5×0.05=$
0.125
$0.4×2.6=$
1.04
$0.26×20=$
5.2
$0.17×0.4=$
0.068
$1.5×0.3=$
0.45
$1.02×0.2=$
0.204
$1.25×0.08=$
0.1
$3.25×10=$
32.5
$1.05×4=$
4.2
$2.05×3=$
6.15
$0.26×5=$
1.3
$2.8×0.5=$
1.4
$0.35×0.2=$
0.07
$2.5×0.6=$
1.5
$8×0.15=$
1.2
$0.33×0.5=$
0.165
$0.81×0.4=$
0.324
答案
0.4 1.2 0.243 2.1 1.02 3 0.6 0.125 1.04 5.2 0.068 0.45 0.204 0.1 32.5 4.2 6.15 1.3 1.4 0.07 1.5 1.2 0.165 0.324
二、用竖式计算。(得数保留两位小数)
$9.08×0.45$
$0.24×4.6$
$7.2×1.84$
$0.023×1.7$
$3.45×0.14$
$0.87×0.56$
$9.08×0.45$
$0.24×4.6$
$7.2×1.84$
$0.023×1.7$
$3.45×0.14$
$0.87×0.56$
答案
4.09 1.10 13.25 0.04 0.48 0.49
