一、口算。
$520÷26=$
$35+75=$
$236÷4=$
$170÷10=$
$740÷20=$
$230×2=$
$25×10=$
$422÷2=$
$320÷80=$
$176÷16=$
$600×16=$
$40×45=$
$2400÷800=$
$308×4=$
$150×20=$
$5×24=$
$78÷39=$
$920÷23=$
$370-200=$
$35+650=$
$401×2=$
$600÷15=$
$60×23=$
$346-99=$
$520÷26=$
$35+75=$
$236÷4=$
$170÷10=$
$740÷20=$
$230×2=$
$25×10=$
$422÷2=$
$320÷80=$
$176÷16=$
$600×16=$
$40×45=$
$2400÷800=$
$308×4=$
$150×20=$
$5×24=$
$78÷39=$
$920÷23=$
$370-200=$
$35+650=$
$401×2=$
$600÷15=$
$60×23=$
$346-99=$
答案
1.20
2.110
3.59
4.17
5.37
6.460
7.250
8.211
9.4
10.11
11.9600
12.1800
13.3
14.1232
15.3000
16.120
17.2
18.40
19.170
20.685
21.802
22.40
23.1380
24.247
2.110
3.59
4.17
5.37
6.460
7.250
8.211
9.4
10.11
11.9600
12.1800
13.3
14.1232
15.3000
16.120
17.2
18.40
19.170
20.685
21.802
22.40
23.1380
24.247
二、用竖式计算。
$772×19=$
$305×42=$
$197×34=$ 
$450×55=$ $254×37=$ $343×58=$
$772×19=$
$450×55=$ $254×37=$ $343×58=$
答案
1.14668
2.12810
3.6698
4.24750
5.9398
6.19894
2.12810
3.6698
4.24750
5.9398
6.19894
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