登录
1. 直接写出得数。
3.6+5=
6.4+1.36=
2.08-1.8=
0.3+0.4-0.1=
9.6-1.6=
0.8+0.6=
5.24+3.7=
7.8-(0.3-0.2)=
4.2-3.6=
6.6-4.5=
4.8-0.04=
7-0.7+0.3=
5.5+0.9=
5.4-4.5=
3.9+0.39=
6+0.9-1.3=
3.4+4.6=
0.19-0.13=
0.74+3.2=
1.8+0.2-0.4=
7.2-2.7=
9.3-3.6=
0.78+2.2=
7.8-0.9-0.1=
0.72+0.24=
5-0.28=
4.15-0.5=
5.64+4-5.64=
0.97+0.03=
15.1+4.9=
0.4-0.38=
4.8-2.1+0.7=
3.6+5=
8.6
6.4+1.36=
7.76
2.08-1.8=
0.28
0.3+0.4-0.1=
0.6
9.6-1.6=
8
0.8+0.6=
1.4
5.24+3.7=
8.94
7.8-(0.3-0.2)=
7.7
4.2-3.6=
0.6
6.6-4.5=
2.1
4.8-0.04=
4.76
7-0.7+0.3=
6.6
5.5+0.9=
6.4
5.4-4.5=
0.9
3.9+0.39=
4.29
6+0.9-1.3=
5.6
3.4+4.6=
8
0.19-0.13=
0.06
0.74+3.2=
3.94
1.8+0.2-0.4=
1.6
7.2-2.7=
4.5
9.3-3.6=
5.7
0.78+2.2=
2.98
7.8-0.9-0.1=
6.8
0.72+0.24=
0.96
5-0.28=
4.72
4.15-0.5=
3.65
5.64+4-5.64=
4
0.97+0.03=
1
15.1+4.9=
20
0.4-0.38=
0.02
4.8-2.1+0.7=
3.4
答案
8.6 7.76 0.28 0.6
8 1.4 8.94 7.7
0.6 2.2 4.76 6.6
6.4 0.9 4.29 5.6
8 0.06 3.94 1.6
4.5 5.7 2.98 6.8
0.96 4.72 3.65 4
1 20 0.02 3.4
8 1.4 8.94 7.7
0.6 2.2 4.76 6.6
6.4 0.9 4.29 5.6
8 0.06 3.94 1.6
4.5 5.7 2.98 6.8
0.96 4.72 3.65 4
1 20 0.02 3.4
2. 用竖式计算,带☆的要验算。
8.36-5.43=
☆2.78+1.692=
10-7.19=
☆9.85-7.28=
226.6+4.83=
0.78+21.98=
竖式及验算略
8.36-5.43=
2.93
☆2.78+1.692=
4.472
10-7.19=
2.81
☆9.85-7.28=
2.57
226.6+4.83=
231.43
0.78+21.98=
22.76
竖式及验算略
答案
2.93 4.472 2.81
2.57 231.43 22.76
竖式及验算略
2.57 231.43 22.76
竖式及验算略
3. 先用计算器算出前三题的得数,再直接写出后两题的得数。$0.1+0.11=$
0.21
$0.1+0.11+0.111=$0.321
$0.1+0.11+0.111+0.1111=$0.4321
$0.1+0.11+0.111+0.1111+0.11111=$0.54321
$0.1+0.11+0.111+…+0.\underbrace{1…1}_{9个1}=$0.987654321
答案
0.21 0.321 0.4321
0.54321 0.987654321
0.54321 0.987654321
