一、口算。(每题1分,共24分)
$8.65+7.34=$ $15-7.8=$ $1.75-0.9=$
$8.4-0.03=$ $5.6+4.4=$ $15.3+0.64=$
$7.65-0.57=$ $20-6.18=$ $8.25+7.36=$
$5-4.2=$ $9.27-1.3=$ $2.9-0.01=$
$0.02+0.18=$ $46.26-26.1=$ $3.2+8.2=$
$10+5.6=$ $8.64+2.7=$ $6.2-6.12=$
$13+5.7=$ $5.1-3.06=$ $3.72+1.28=$
$12.85-3.6=$ $3.94+0.06=$ $3.6-1.2=$

15.99 7.2 0.85
8.37 10 15.94
7.08 13.82 15.61
0.8 7.97 2.89
0.2 20.16 11.4
15.6 11.34 0.08
18.7 2.04 5
9.25 4 2.4

二、用竖式计算,带*的要验算。(第1、4题每题3分,其余每题4分,共22分)
14.59+1.27 24.7+2.54 *9.1-2.36
10-5.72 12.74-9.58 *5.64+23.48

15.86 27.24 6.74
4.28 3.16 29.12

三、计算下面各题,怎样简便就怎样计算。(每题4分,共32分)
$(582-412)×24+325$ $0.75+57.88+2.25+0.12$
$43×141+43×58+43$ $52.87-17.75-12.25$
$[610-(542-225)]×22$ $508-1128÷24+243$
$307-3600÷25÷4$ $3.47+5.92+6.53$

4405 61
8600 22.87
6446 704
271 15.92