7×101 5.5×9.8 82×0.9 0.36×0.25 100-15×4.6 2.04×52 9+5.29

问题描述:

7×101 5.5×9.8 82×0.9 0.36×0.25 100-15×4.6 2.04×52 9+5.29

应该1.7×101=1.7×(100+1)=170+1.7=171.75.5×9.8=5.5×(10-0.2)=55-1.1=53.982×0.9=82×(1-0.1)=82-8.2=73.80.36×0.25 =0.6×0.6×0.5×0.5=0.3×0.3=0.09100-15×4.6=100-15×4-15×0.6=...