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15.25-4.72+4.75+5.28简便 =15.25+4.75-4.72+5.28 =20-4.72+5.28 =15.28+5.28 =20.56
15.25减4.72加4.75减5.28简便计算=(15.25+4.75)-(4.72+5.28)=20-10 =10
15.25+4.72+4.75+5.28怎样简便=(15.25+4.75)+(4.72+5.28),=20+10,=30;③34.823-(4.82+15.2),=34.823-4.82-15.2,=30.003-15.2,=14.803;④12.7-4.8-5.2,=12.7-(4.8+5.2),=12.7-10,=2.7;
简便计算(1)15.25+4.72+4.75+5.28(2)12.7-4.8-5.2(3)34.82-(4.82+15.2...(1)15.25+4.72+4.75+5.28=(15.25+4.75)+(4.72+5.28)=20+10=30(2)12.7-4.8-5.2=12.7-(4.8+5.2)=12.7-10=2.7(3)34.82-(4.82+15.2)=34.82-4.82-15.2=30-15.2=14.8(4)9.85+4.9-7.85=(9.85-7.85)+4.9=2+4.9=6.9(5)8.64...
怎样简便怎样算3.1+(25.78+6.9①3.1+(25.78+6.9)=(3.1+6.9)+25.78=10+25.78=35.78②15.25+4.72+4.75+5.28=(15.25+4.75)+(4.72+5.28)=20+10=30③34.82-(4.82+15.2)=34.82-4.82-15.2=30-15.2=14.8④12.7-4.8-5.2=12.7-(4.8+5.2)=12.7-10=2.7 ...
l5.23+4.72十4.75怎样简便解:依题意得算式,15.23+4.72+4.75 =15.25-0.02+4.72+4.75 =15.25+4.75+(4.72-0.02)=20+4.7 =24.7 即15.23+4.72+4.75=24.7
数学题脱式计算脱式计算(一)9.4+0.3-6.4 34.82-(4.82+15.2) 15.25+4.72+4.75+5.28 =9.4-6.4+0.3 =34.82-4.82-15.2 =(15.25+4.25)+(4.72+5.28)=3+0.3 =30-15.2 =20+10 =3.3 =14.8 ...
简便计算13.8-2.99①13.8-2.99,=13.8-3+0.01,=10.8+0.01,=10.81;②3.1+25.78+6.9,=(3.1+6.9)+25.78,=10+25.78,=35.78;③12.7-4.8-5.2,=12.7-(4.8+5.2),=12.7-10,=2.7;④34.82-(4.82+15.2),=34.82-4.82-15.2,=30-15.2,=14.8;⑤15.25+4...
简便计算3.1+25.7(1)3.1+25.78+6.9,=(3.1+6.9)+25.78,=10+25.78,=35.78;(2)12.7-4.8-5.2,=12.7-(4.8+5.2),=12.7-10,=2.7;(3)34.82-(4.82+15.2),=34.82-4.82-15.2,=30-15.2,=14.8;(4)15.25+4.72+4.75+5.28,=(15.25+4.75)+(4....
用简便方法计算.4.2+16.73+5.8 1(1)4.2+16.73+5.8=(4.2+5.8)+16.73=10+16.73=26.73(2)15.9-3.7-6.3=15.9-(3.7+6.3)=15.9-10=5.9(3)43.28-(6.28+17.1)=43.28-6.28-17.1=37-17.1=19.9(4)15.25+4.72+4.75+5.28=(15.25+4.75)+(4.72+5.28)=20+10=30 ...