很快算出得数。
⑴5+0.4= |
⑵1.4+2.7= |
⑶8.2+3.7= |
⑷5+2.4= |
⑸1.8﹣2.7= |
⑹7.3+0.9= |
⑺2+5.3= |
⑻2.0+1.8= |
⑼5.7+2.8= |
⑽6+2.2= |
⑾1.5+8.5= |
⑿7.4+1.6= |
⒀5﹣6.5= |
⒁3.2﹣2.3= |
⒂4.2﹣2.2= |
⒃2﹣2.3= |
用竖式计算,带*号的要验算
305×8= |
538+219= |
*327+456= |
418×7= |
890×6= |
*712﹣248= |
直接写出得数
1000﹣630= |
200+510= |
500×6= |
1400×5= |
280+720= |
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计算题
(1)9999+999+99+9+5
(2)52+37+48+63
(3)125×5×64×25
(4)510+511+512+513+514+515.
计算下面各题,能简便计算的要简便计算.
(1)5.27﹣1.98﹣0.02
(2)3.2×5.7+6.8×5.7
(3)8.1÷(0.9×0.3)
(4)〔1.6+19.2÷(22﹣21.7)〕×5.
用竖式计算.
9.73+0.27= |
6﹣1.55= |
3.05×0.66= |
22.5÷0.25= |