ldcf.net
当前位置:首页 >> 脱式计算(能简算的要简算).(1)25.4×1.25×0.8... >>

脱式计算(能简算的要简算).(1)25.4×1.25×0.8...

(1)25.4×1.25×0.8=25.4×(12.5×0.8)=25.4×10=254;(2)3.9÷2×(4.94-3.64)=1.95×1.3=2.535;(3)38.4÷0.25÷4=38.4÷(0.25×4)=38.4÷1=38.4;(4)3.47÷(3.47×4 )=3.47÷3.47÷4=1÷4=0.25;(5)1.25×4.6×8=(1.25×8)×4.6=10×4.6=46;(6...

(1)1.01+1.01×99,=1.01×(1+99),=1.01×100,=101;(2)1.25×7.85×0.8,=1.25×0.8×7.85,=1×7.85,=7.85;(3)25×32×1.25,=25×4×8×1.25,=(25×4)×(8×1.25),=100×10,=1000;(4)10.1×101,=10.1×(100+1),=10.1×100+1.01×1,=10...

(1)0.08×720×1.25=0.08×1.25×720=0.1×720=72;(2)5.25×8.2+5.25×0.8+5.25=5.25×(8.2+0.8+1)=5.25×10=52.5;(3)0.125×808=0.125×(8×101)=(0.125×8)×101=1×101=101;(4)18.45-(3.8×2.7+5.3)=18.45-(10.26+5.3)=18.45-15.56=2.89...

(1)8×0.4×1.25×2.5,=(8×1.25)×(0.4×2.5),=10×1,=10;(2)72×99,=72×(100-1),=7200-72,=7128;(3)24×( 1 3 - 1 8 ),=24× 1 3 -24× 1 8 ,=8-3,=5;(4)27.4-52.8÷(1.9+2.1),=27.4-52.8÷4,=27.4-13.2,=14.2.

(1)13÷0.4÷2.5,=13÷(0.4×2.5),=13÷1,=13;(2)64×4.5+36×4.5,=(64+36)×4.5,=100×4.5,=450;(3)1.25×2.5×0.8,=1.25×0.8×2.5,=1×2.5,=2.5;(4)1.5×101-1.5,=1.5×(101-1),=1.5×100,=150;(5)14.64+3.7×2.8,=14.64+10....

=(1.25+0.1)×4.2×0.8 =(1.25×0.8+0.1×0.8)×4.2 =(10+0.08)×4.2 =10×4.2+0.08×4.2 =42+0.336 =42.336

(1)7.8÷1.25÷8=7.8÷(1.25×8)=7.8÷10=0.78(2)0.67×99+0.67=0.67×(99+1)=0.67×100=67(3)3.76×2.9-1.9×3.76=3.76×(2.9-1.9)=3.76×1=3.76(4)2.5×3.2×1.25=(2.5×4)×(0.8×1.25)=10×1=10(5)0.38+9.62÷3.7×5.2=0.38+2.6×5.2=0.38+13...

①1.258×18.5-0.258×18.5,=18.5×(1.258-0.258),=18.5×1,=18.5;②8.48÷0.8×0.9,=10.6×0.9,=9.54;③1.25×2.4,=1.25×8×0.3,=10×0.3,=3;④5.85÷(1.3+0.5)×6,=5.85÷1.8×6,=3.25×6,=19.5.

(1)6.4×1.25×12.5,=8×0.8×1.25×12.5,=(8×1.25)×(0.8×12.5),=10×10,=100;(2)1.7×9.9+0.17,=1.7×9.9+1.7×0.1,=1.7×(9.9+0.1),=1.7×10,=17;(3)[(2+2.8)÷0.6-1.5]×0.04,=[4.8÷0.6-1.5]×0.04,=[8-1.5]×0.04,=6.5×0.04,=0...

(1)1020+270÷18-864,=1020+15-864,=171;(2)23÷0.8×34,=23÷45×34,=23×54×34,=58;(3)18+57+6.875+27,=(18+6.875)+(57+27),=(0.125+6.875)+1,=7+1,=8;(4)0.25×64×125%,=0.25×4×2×8×1.25,=(0.25×4)×(8×1.25)×2,=1×...

网站首页 | 网站地图
All rights reserved Powered by www.ldcf.net
copyright ©right 2010-2021。
内容来自网络,如有侵犯请联系客服。zhit325@qq.com