题目内容
列竖式计算下面各题.
0.86×7= | 0.79×4= | 3.5×16= | 12.5×42= | 18.6×23= |
0.58×32= | 0.8×7= | 2.5×6= | 2.05×4= | 12.4×7= |
36.8×9= | 0.7×4= | 3.6×3= | 2.3×5= | 3.3×8= |
分析:根据小数、整数乘法的计算方法进行列竖式计算,即可得到答案.
解答:解:0.86×7=6.02,
0.86
;
0.79×4=3.16,
0.79
;
3.5×16=56,
3.5
;
12.5×42=525,
12.5
;
18.6×23=427.8,
18.6
;
0.58×32=18.56,
0.56
;
0.8×7=5.6,
0.8
;
2.5×6=15,
2.5
;
2.05×4=8.2,
2.05
;
12.4×7=86.8,
12.4
;
36.8×9=331.2,
36.8
;
0.7×4=2.8,
0.7
;
3.6×3=10.8,
3.6
;
2.3×5=11.5,
2.3
;
3.3×8=26.4.
3.3
.
0.86
× 7 |
6.02 |
0.79×4=3.16,
0.79
× 4 |
3.16 |
3.5×16=56,
3.5
×16 |
210 |
35 |
56.0 |
12.5×42=525,
12.5
×42 |
250 |
500 |
525.0 |
18.6×23=427.8,
18.6
×23 |
558 |
372 |
427.8 |
0.58×32=18.56,
0.56
× 32 |
116 |
174 |
18.56 |
0.8×7=5.6,
0.8
×7 |
5.6 |
2.5×6=15,
2.5
×6 |
15.0 |
2.05×4=8.2,
2.05
×4 |
8.20 |
12.4×7=86.8,
12.4
× 7 |
86.8 |
36.8×9=331.2,
36.8
× 9 |
331.2 |
0.7×4=2.8,
0.7
× 4 |
2.8 |
3.6×3=10.8,
3.6
×3 |
10.8 |
2.3×5=11.5,
2.3
× 5 |
11.5 |
3.3×8=26.4.
3.3
× 8 |
26.4 |
点评:此题主要考查的是小数和整数乘法的计算方法.
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