1. 直接写出得数。(14☆)
8.4×0.6=
3.3×8=
99×0.9=
3.2×0.6=
0.16×0.7=
3.6×0.7=
8.3×0.2=
87×0.9=
20×0.3=
4.3×0.3=
8.6×0.1=
12×0.5=
73×0.5=
7.2×0.5=
6.2×2=
6.7×0.2=
8×0.3=
0.2×0.3=
19×0.1=
25×0.1=
1×0.7=
97×0.8=
8.2×0.4=
96×0.2=
74×0.9=
0.73×0.8=
2.2×0.5=
8.6×8=
8.4×0.6=
3.3×8=
99×0.9=
3.2×0.6=
0.16×0.7=
3.6×0.7=
8.3×0.2=
87×0.9=
20×0.3=
4.3×0.3=
8.6×0.1=
12×0.5=
73×0.5=
7.2×0.5=
6.2×2=
6.7×0.2=
8×0.3=
0.2×0.3=
19×0.1=
25×0.1=
1×0.7=
97×0.8=
8.2×0.4=
96×0.2=
74×0.9=
0.73×0.8=
2.2×0.5=
8.6×8=
答案
1. 5.04
26.4
89.1
1.92
0.112
2.52
1.66
78.3
6
1.29
0.86
6
36.5
3.6
12.4
1.34
2.4
0.06
1.9
2.5
0.7
77.6
3.28
19.2
66.6
0.584
1.1
68.8
26.4
89.1
1.92
0.112
2.52
1.66
78.3
6
1.29
0.86
6
36.5
3.6
12.4
1.34
2.4
0.06
1.9
2.5
0.7
77.6
3.28
19.2
66.6
0.584
1.1
68.8
2. 按要求填表。(12☆)
| 算式 | 得数精确到个位 | 得数精确到十分位 | 得数精确到百分位 |
| ---- | ---- | ---- | ---- |
| 4.29×5.3 | |
| |
| 0.86×0.75 | | | |
| 算式 | 得数精确到个位 | 得数精确到十分位 | 得数精确到百分位 |
| ---- | ---- | ---- | ---- |
| 4.29×5.3 | |
| 0.86×0.75 | | | |
答案
2. 4.29×5.3:精确到个位23,精确到十分位22.7,精确到百分位22.74
0.86×0.75:精确到个位1,精确到十分位0.6,精确到百分位0.65
0.86×0.75:精确到个位1,精确到十分位0.6,精确到百分位0.65
3. 列竖式计算,得数保留两位小数。(24☆)
0.405×0.03≈
0.423×0.52≈
0.045×0.24≈
0.84×0.203≈
0.725×0.16≈
0.054×0.69≈
用时:分钟 ★共得:☆/50 ☆
0.405×0.03≈
0.423×0.52≈
0.045×0.24≈
0.84×0.203≈
0.725×0.16≈
0.054×0.69≈
用时:分钟 ★共得:☆/50 ☆
答案
3. 竖式计算的得数:
0.01215 0.21996 0.0108
0.17052 0.116 0.03726
取近似数:
0.01 0.22 0.01
0.17 0.12 0.04
0.01215 0.21996 0.0108
0.17052 0.116 0.03726
取近似数:
0.01 0.22 0.01
0.17 0.12 0.04
登录