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198×0.51的简便计算

198×0.51 =(200-2)x0.51 =200x0.51-2x0.51 =102-1.02 =100.98 谢谢,请采纳

0.51x198 =0.51x(200-2) =0.51x200-0.51x2 =102-1.02 =100.98

98*0.51 =(100-2)*0.51 =51-1.02 =49.98

198x0.51=(200-2)x0.51=102-1.02=100.98

98*0.51 =(100-2)*0.51 =51-1.02 =49.98

=3*9.5=28.5

201*0.51 =(200+1)*(0.5+1) =100+200+0.5+1 =301.5

4.9+4.8+48x0.51 =4.8+0.1+4.8+4.8×5.1 =4.8(1+1+5.1)+0.1 =4.8×7.1+0.1 =34.18

49.38

51×19+57简便计算 =51×19+51+6 =51×(19+1)+6 =51×20+6 =1020+6 =1026

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