1. 直接写出得数。
0.04+5=
1-0.01=
3.6+5.4=
0.97-0.17=
11-0.11=
1-0.98=
10-3.7=
4.4+5.6-4.4=
5.3+4.9-1.2=
3-0.18+2.14=
7.5-0.75+2.1=
0.04+5=
5.04
1-0.01=
0.99
3.6+5.4=
9
0.97-0.17=
0.8
11-0.11=
10.89
1-0.98=
0.02
10-3.7=
6.3
4.4+5.6-4.4=
5.6
5.3+4.9-1.2=
9
3-0.18+2.14=
4.96
7.5-0.75+2.1=
8.85
答案
$0.04 + 5 = 5.04$;
$1 - 0.01 = 0.99$;
$3.6 + 5.4 = 9$;
$0.97 - 0.17 = 0.8$;
$11 - 0.11 = 10.89$;
$1 - 0.98 = 0.02$;
$10 - 3.7 = 6.3$;
$4.4 + 5.6 - 4.4 = 5.6$;
$5.3 + 4.9 - 1.2 = 9$;
$3 - 0.18 + 2.14 = 4.96$;
$7.5 - 0.75 + 2.1 = 8.85$。
$1 - 0.01 = 0.99$;
$3.6 + 5.4 = 9$;
$0.97 - 0.17 = 0.8$;
$11 - 0.11 = 10.89$;
$1 - 0.98 = 0.02$;
$10 - 3.7 = 6.3$;
$4.4 + 5.6 - 4.4 = 5.6$;
$5.3 + 4.9 - 1.2 = 9$;
$3 - 0.18 + 2.14 = 4.96$;
$7.5 - 0.75 + 2.1 = 8.85$。
2. 用竖式计算。(第一行的3题要验算)
80-8.08=
验算:
5.96+7.34=
验算:
8.18+2.8=
验算:
7.42+0.65=
6.02-5.97=
3.2-1.203=
6.25+1.03=
35-2.007=
8.09+0.051=
80-8.08=
71.92
验算:
71.92 + 8.08 = 80
5.96+7.34=
13.3
验算:
13.3 - 7.34 = 5.96
8.18+2.8=
10.98
验算:
10.98 - 2.8 = 8.18
7.42+0.65=
8.07
6.02-5.97=
0.05
3.2-1.203=
1.997
6.25+1.03=
7.28
35-2.007=
32.993
8.09+0.051=
8.141
答案
$1$. $80 - 8.08 = 71.92$
验算:$71.92 + 8.08 = 80$
$2$. $5.96 + 7.34 = 13.3$
验算:$13.3 - 7.34 = 5.96$
$3$. $8.18 + 2.8 = 10.98$
验算:$10.98 - 2.8 = 8.18$
$4$. $7.42 + 0.65 = 8.07$
$5$. $6.02 - 5.97 = 0.05$
$6$. $3.2 - 1.203 = 1.997$
$7$. $6.25 + 1.03 = 7.28$
$8$. $35 - 2.007 = 32.993$
$9$. $8.09 + 0.051 = 8.141$
验算:$71.92 + 8.08 = 80$
$2$. $5.96 + 7.34 = 13.3$
验算:$13.3 - 7.34 = 5.96$
$3$. $8.18 + 2.8 = 10.98$
验算:$10.98 - 2.8 = 8.18$
$4$. $7.42 + 0.65 = 8.07$
$5$. $6.02 - 5.97 = 0.05$
$6$. $3.2 - 1.203 = 1.997$
$7$. $6.25 + 1.03 = 7.28$
$8$. $35 - 2.007 = 32.993$
$9$. $8.09 + 0.051 = 8.141$
3. 
(1)各自从家到学校,小华要比小东多走多少千米?
(2)各自从家到少年宫,小华要比小东多走多少千米?
(1)各自从家到学校,小华要比小东多走多少千米?
(2)各自从家到少年宫,小华要比小东多走多少千米?
答案
(1)3.65-0.89=2.76(千米)
(2)3.65+0.89+2.13-2.13=4.54(千米)
(2)3.65+0.89+2.13-2.13=4.54(千米)
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