登录
1. 直接写出得数。
5.6-2.3=
4.6+6=
8-0.72=
1-0.9+0.1=
9.9+0.1=
3.5+2.5=
1.5-0.43=
1-0.8+0.2=
5.5+5=
7.2+2.8=
5.43-1.4=
2.3+1.5-0.1=
7.8-2.3=
0.4-0.1=
7.8+0.22=
0.9+1.3+1.1=
0.6+0.9=
3.6-0.3=
3-0.03=
4.5-2.5+4.1=
1.3-0.4=
4.3+1.7=
3.26-0.2=
0.3+2.5-0.4=
4.9+2.6=
6.8+8.6=
2.04-0.8=
3.6-1.9+1.8=
7-2.8=
1.5-0.9=
2-1.78=
5-2.6+1.7=
5.6-2.3=
3.3
4.6+6=
10.6
8-0.72=
7.28
1-0.9+0.1=
0.2
9.9+0.1=
10
3.5+2.5=
6
1.5-0.43=
1.07
1-0.8+0.2=
0.4
5.5+5=
10.5
7.2+2.8=
10
5.43-1.4=
4.03
2.3+1.5-0.1=
3.7
7.8-2.3=
5.5
0.4-0.1=
0.3
7.8+0.22=
8.02
0.9+1.3+1.1=
3.3
0.6+0.9=
1.5
3.6-0.3=
3.3
3-0.03=
2.97
4.5-2.5+4.1=
6.1
1.3-0.4=
0.9
4.3+1.7=
6
3.26-0.2=
3.06
0.3+2.5-0.4=
2.4
4.9+2.6=
7.5
6.8+8.6=
15.4
2.04-0.8=
1.24
3.6-1.9+1.8=
3.5
7-2.8=
4.2
1.5-0.9=
0.6
2-1.78=
0.22
5-2.6+1.7=
4.1
答案
1. 3.3 10.6 7.28 0.2 10 6 1.07 0.4 10.5 10 4.03 3.7 5.5 0.3 8.02 3.3 1.5 3.3 2.97 6.1 0.9 6 3.06 2.4 7.5 15.4 1.24 3.5 4.2 0.6 0.22 4.1
解析
3.3；10.6；7.28；0.2；10；6；1.07；0.4；10.5；10；4.03；3.7；5.5；0.3；8.02；3.3；1.5；3.3；2.97；6.1；0.9；6；3.06；2.4；7.5；15.4；1.24；3.5；4.2；0.6；0.22；4.1
2. 计算下面各题。
1.56+9.82+1.07
24.63-5.37+11.7
8.23+4.5-10.65
0.65+19.34+2.01
9.05-2.98-3.2
14.8-2.6+1.7
1.56+9.82+1.07
24.63-5.37+11.7
8.23+4.5-10.65
0.65+19.34+2.01
9.05-2.98-3.2
14.8-2.6+1.7
答案
2. 12.45 30.96 2.08 22 2.87 13.9
解析
1.56+9.82+1.07=11.38+1.07=12.45
24.63-5.37+11.7=19.26+11.7=30.96
8.23+4.5-10.65=12.73-10.65=2.08
0.65+19.34+2.01=19.99+2.01=22
9.05-2.98-3.2=6.07-3.2=2.87
14.8-2.6+1.7=12.2+1.7=13.9
24.63-5.37+11.7=19.26+11.7=30.96
8.23+4.5-10.65=12.73-10.65=2.08
0.65+19.34+2.01=19.99+2.01=22
9.05-2.98-3.2=6.07-3.2=2.87
14.8-2.6+1.7=12.2+1.7=13.9
巧算:9.8+99.98+999.998+9999.9998。
答案
原式=(10-0.2)+(100-0.02)+(1000-0.002)+(10000-0.0002)=(10+100+1000+10000)-(0.2+0.02+0.002+0.0002)=11110-0.2222=11109.7778
