1.05×0.86=0.903;
1.05
× 0.86
.
630
840
0.9030
0.32÷0.025=12.8;
12.8
25 320
25
70
50
200
200
0
验算:
12.8
× 0.025
.
640
256
0.3200
3.38÷1.8=1.8
•
7
1.877
18 33.8
18
158
144
140
136
140
136
14
1.05×0.86=0.903;
1.05
× 0.86
.
630
840
0.9030
0.32÷0.025=12.8;
12.8
25 320
25
70
50
200
200
0
验算:
12.8
× 0.025
.
640
256
0.3200
3.38÷1.8=1.8
•
7
1.877
18 33.8
18
158
144
140
136
140
136
14