1.直接写出得数。
20.7-3.6=
10+3.5=
4+6.99=
5.1-2.3=
8.5-4.2=
0.63-0.43=
0.53+0.4=
8-4.33=
20.7-3.6=
10+3.5=
4+6.99=
5.1-2.3=
8.5-4.2=
0.63-0.43=
0.53+0.4=
8-4.33=
答案
20.7-3.6=17.1
10+3.5=13.5
4+6.99=10.99
5.1-2.3=2.8
8.5-4.2=4.3
0.63-0.43=0.2
0.53+0.4=0.93
8-4.33=3.67
10+3.5=13.5
4+6.99=10.99
5.1-2.3=2.8
8.5-4.2=4.3
0.63-0.43=0.2
0.53+0.4=0.93
8-4.33=3.67
2.用竖式计算下面各题,并验算。
$34.8+12.32=$
$50-37.56=$
$176.35-18.9=$
$15.21+4.2=$
$34.8+12.32=$
$50-37.56=$
$176.35-18.9=$
$15.21+4.2=$
答案
$34.8+12.32=47.12$
$50-37.56=12.44$
$176.35-18.9=157.45$
$15.21+4.2=19.41$
$50-37.56=12.44$
$176.35-18.9=157.45$
$15.21+4.2=19.41$
3.计算下面各题。
63.8-25.6+18.7
56.4-13.7-11.4
60-(3.8+5.2)
33.5-(18.6-7.8)
12.1+15.6+65.7
23.4-(5.8+7.2)
63.8-25.6+18.7
56.4-13.7-11.4
60-(3.8+5.2)
33.5-(18.6-7.8)
12.1+15.6+65.7
23.4-(5.8+7.2)
答案
63.8-25.6+18.7=56.9
56.4-13.7-11.4=31.3
60-(3.8+5.2)=51
33.5-(18.6-7.8)=22.7
12.1+15.6+65.7=93.4
23.4-(5.8+7.2)=10.4
56.4-13.7-11.4=31.3
60-(3.8+5.2)=51
33.5-(18.6-7.8)=22.7
12.1+15.6+65.7=93.4
23.4-(5.8+7.2)=10.4
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