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問(wèn)答題按有效數(shù)字運(yùn)算規(guī)則計(jì)算：6.969÷2.30+5.362

原式=3.03+5.362≈8.39

1.問(wèn)答題按有效數(shù)字運(yùn)算規(guī)則計(jì)算：8.758+3.65×2.4

原式=8.76+8.8=17.56≈17.6

2.問(wèn)答題按有效數(shù)字運(yùn)算規(guī)則計(jì)算（10.896-8.64）÷1.13

原式=2.26÷1.13=2.00

3.問(wèn)答題按有效數(shù)字運(yùn)算規(guī)則計(jì)算： (2.56+3.874)×1.5

原式=6.43×1.5=9.645≈9.6

4.問(wèn)答題按有效數(shù)字運(yùn)算規(guī)則計(jì)算：12.315+3.567+6.83-8.1671

原式≈14.54

5.問(wèn)答題按有效數(shù)字運(yùn)算規(guī)則計(jì)算：0.816×0.65-0.314

原式=0.530-0.314≈0.22