计算
$0.72 + 1.21 =$
$2.14 + 6.06 =$
$8.18 - 8.08 =$
$0.53 - 0.4 =$
$1.46 - 0.5 =$
$3.27 - 2.47 =$
$0.85 - 0.3 =$
$4.37 - 0.94 =$
$1.33 + 1.7 =$
$4.6 + 0.44 =$
$7.3 + 3.06 =$
$2.05 + 5.8 =$
$0.47 + 1.3 =$
$4.12 - 1.8 =$
$0.29 - 0.17 =$
$3.24 + 4.11 =$
$0.46 + 7.13 =$
$0.98 - 0.09 =$
$0.72 + 1.21 =$
$2.14 + 6.06 =$
$8.18 - 8.08 =$
$0.53 - 0.4 =$
$1.46 - 0.5 =$
$3.27 - 2.47 =$
$0.85 - 0.3 =$
$4.37 - 0.94 =$
$1.33 + 1.7 =$
$4.6 + 0.44 =$
$7.3 + 3.06 =$
$2.05 + 5.8 =$
$0.47 + 1.3 =$
$4.12 - 1.8 =$
$0.29 - 0.17 =$
$3.24 + 4.11 =$
$0.46 + 7.13 =$
$0.98 - 0.09 =$
答案
1.93,8.2,0.1,0.13,0.96,0.8,0.55,3.43,3.03,5.04,10.36,7.85,1.77,2.32,0.12,7.35,7.59,0.89
解析
0.72 + 1.21:小数点对齐,从百分位加起,2+1=3,7+2=9,0+1=1,结果1.93;
2.14 + 6.06:百分位4+6=10,向十分位进1,十分位1+0+1=2,个位2+6=8,结果8.2;
8.18 - 8.08:百分位8-8=0,十分位1-0=1,个位8-8=0,结果0.1;
0.53 - 0.4:0.4看作0.40,百分位3-0=3,十分位5-4=1,结果0.13;
1.46 - 0.5:0.5看作0.50,百分位6-0=6,十分位4-5不够减,从个位借1当10,14-5=9,个位0,结果0.96;
3.27 - 2.47:百分位7-7=0,十分位2-4不够减,从个位借1当10,12-4=8,个位2-2=0,结果0.8;
0.85 - 0.3:0.3看作0.30,百分位5-0=5,十分位8-3=5,结果0.55;
4.37 - 0.94:百分位7-4=3,十分位3-9不够减,从个位借1当10,13-9=4,个位3-0=3,结果3.43;
1.33 + 1.7:1.7看作1.70,百分位3+0=3,十分位3+7=10,向个位进1,个位1+1+1=3,结果3.03;
4.6 + 0.44:4.6看作4.60,百分位0+4=4,十分位6+4=10,向个位进1,个位4+0+1=5,结果5.04;
7.3 + 3.06:7.3看作7.30,百分位0+6=6,十分位3+0=3,个位7+3=10,结果10.36;
2.05 + 5.8:5.8看作5.80,百分位5+0=5,十分位0+8=8,个位2+5=7,结果7.85;
0.47 + 1.3:1.3看作1.30,百分位7+0=7,十分位4+3=7,个位0+1=1,结果1.77;
4.12 - 1.8:1.8看作1.80,百分位2-0=2,十分位1-8不够减,从个位借1当10,11-8=3,个位3-1=2,结果2.32;
0.29 - 0.17:百分位9-7=2,十分位2-1=1,结果0.12;
3.24 + 4.11:百分位4+1=5,十分位2+1=3,个位3+4=7,结果7.35;
0.46 + 7.13:百分位6+3=9,十分位4+1=5,个位0+7=7,结果7.59;
0.98 - 0.09:百分位8-9不够减,从十分位借1当10,18-9=9,十分位8-0=8,结果0.89。
2.14 + 6.06:百分位4+6=10,向十分位进1,十分位1+0+1=2,个位2+6=8,结果8.2;
8.18 - 8.08:百分位8-8=0,十分位1-0=1,个位8-8=0,结果0.1;
0.53 - 0.4:0.4看作0.40,百分位3-0=3,十分位5-4=1,结果0.13;
1.46 - 0.5:0.5看作0.50,百分位6-0=6,十分位4-5不够减,从个位借1当10,14-5=9,个位0,结果0.96;
3.27 - 2.47:百分位7-7=0,十分位2-4不够减,从个位借1当10,12-4=8,个位2-2=0,结果0.8;
0.85 - 0.3:0.3看作0.30,百分位5-0=5,十分位8-3=5,结果0.55;
4.37 - 0.94:百分位7-4=3,十分位3-9不够减,从个位借1当10,13-9=4,个位3-0=3,结果3.43;
1.33 + 1.7:1.7看作1.70,百分位3+0=3,十分位3+7=10,向个位进1,个位1+1+1=3,结果3.03;
4.6 + 0.44:4.6看作4.60,百分位0+4=4,十分位6+4=10,向个位进1,个位4+0+1=5,结果5.04;
7.3 + 3.06:7.3看作7.30,百分位0+6=6,十分位3+0=3,个位7+3=10,结果10.36;
2.05 + 5.8:5.8看作5.80,百分位5+0=5,十分位0+8=8,个位2+5=7,结果7.85;
0.47 + 1.3:1.3看作1.30,百分位7+0=7,十分位4+3=7,个位0+1=1,结果1.77;
4.12 - 1.8:1.8看作1.80,百分位2-0=2,十分位1-8不够减,从个位借1当10,11-8=3,个位3-1=2,结果2.32;
0.29 - 0.17:百分位9-7=2,十分位2-1=1,结果0.12;
3.24 + 4.11:百分位4+1=5,十分位2+1=3,个位3+4=7,结果7.35;
0.46 + 7.13:百分位6+3=9,十分位4+1=5,个位0+7=7,结果7.59;
0.98 - 0.09:百分位8-9不够减,从十分位借1当10,18-9=9,十分位8-0=8,结果0.89。
列式计算
$16 - 8.7 =$
$6.95 + 2.98 =$

$0.9 - 0.38 =$
$27.45 + 3.685 =$


$9.3 + 12.67 =$
$100 - 3.96 =$


$10.8 + 5.27 =$
$7.6 - 0.706 =$


$16 - 8.7 =$
$6.95 + 2.98 =$
$0.9 - 0.38 =$
$27.45 + 3.685 =$
$9.3 + 12.67 =$
$100 - 3.96 =$
$10.8 + 5.27 =$
$7.6 - 0.706 =$
答案
7.3;9.93;0.52;31.135;21.97;96.04;16.07;6.894
解析
16 - 8.7 = 7.3
```
16.0
8.7
------
7.3
```
6.95 + 2.98 = 9.93
```
6.95
+ 2.98
------
9.93
```
0.9 - 0.38 = 0.52
```
0.90
0.38
------
0.52
```
27.45 + 3.685 = 31.135
```
27.450
+ 3.685
--------
31.135
```
9.3 + 12.67 = 21.97
```
9.30
+12.67
------
21.97
```
100 - 3.96 = 96.04
```
100.00
3.96
------
96.04
```
10.8 + 5.27 = 16.07
```
10.80
+ 5.27
------
16.07
```
7.6 - 0.706 = 6.894
```
7.600
0.706
------
6.894
```
```
16.0
8.7
------
7.3
```
6.95 + 2.98 = 9.93
```
6.95
+ 2.98
------
9.93
```
0.9 - 0.38 = 0.52
```
0.90
0.38
------
0.52
```
27.45 + 3.685 = 31.135
```
27.450
+ 3.685
--------
31.135
```
9.3 + 12.67 = 21.97
```
9.30
+12.67
------
21.97
```
100 - 3.96 = 96.04
```
100.00
3.96
------
96.04
```
10.8 + 5.27 = 16.07
```
10.80
+ 5.27
------
16.07
```
7.6 - 0.706 = 6.894
```
7.600
0.706
------
6.894
```
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