五年级上册数学小数简便计算题

五年级上册数学小数简便计算题


简介:
0.77×101 =0.77×(100+1) =0.77×100+0.77×1 =77+0.77 =77.77 1.01+9×1.01 =1.01×1+9×1.01 =(1+9)×1.01 =10×1.01 =10.1 0.65×201 =0.65×(200+1) =0.65×200+0.65×1 =130+0.65 =130.65 0.45×101 =0.45×(100+1) =0.45×100+0.45×1 =45+0.45 =45.45 2.5×9.8 =2.5×(10-0.2) =2.5×10-2.5×0.2 =25-0.5 =24.5 102×0.85 =(100+2)×0.85 =100×0.85+2×0.85 =85+1.7 =86.7 9.4×10.1 =9.4×(10+0.1) =9.4×10+9.4×0.1 =94+0.94 =94.94 9.5×101 =9.5×(100+1) =9.5×100+9.5×1 =950+9.5 =959.5