ldcf.net
当前位置:首页 >> 脱式计算,能简算的要简算(1)5.6÷0.14÷4; ... >>

脱式计算,能简算的要简算(1)5.6÷0.14÷4; ...

(1) 4 5 - 4 5 ÷ 2 3 × 1 2 = 4 5 - 4 5 × 3 2 × 1 2 = 4 5 - 3 5 = 1 5 ;(2)( 2 3 + 4 15 )×15= 14 15 ×15=14;(3)12.87+3.65+1.35=12.87+(3.65+1.35)=12.87+5=17.87;(4)74.6×19+19×25.4=(74.6+25.4)×19=100×19=1900;(5)【...

(1)8.6×10.1=8.6×(10+0.1)=8.6×10+8.6×0.1=86+0.86=86.86;(2)9.07-22.78÷3.4=9.07-6.7=2.37;(3)5.6×(12.5-8.5÷0.85)=5.6×(12.5-10)=5.6×2.5=14;(4)150÷2.5+150÷7.5=60+20=80;(5)[(8.1-5.6)×0.9-1]×0.4=[2.5×0.9-1]×0.4=[2...

(1)4.75+8.4÷(9.2-6.8)=4.75+8.4÷2.4=4.75+3.5=8.25(2)1.2÷[2.5×(4.3-2.7)]=1.2÷[2.5×1.6]=1.2÷4=0.3(3)3.4×5.9+5.9×5.6+5.9=(3.4+5.6+1)×5.9=10×5.9=59

(8)84+27×84+y7÷4,=84+27×84+y7×84,=(8+27+y7)×84,=2×84,=82;(2)82.4-2.4×3.7y÷2.y,=82.4-七÷2.y,=82.4-3.6,=8.8;(3)2.y×2y-0.28÷83+七.63,=8-0.63+七.63,=8+(七.63-0.63),=8+七,=80;(4)8七七七+七七七×七七七,=8000...

①624-298=624-(300-2)=624-300+2=324+2=326②0.8×〔13-(3.012+5.28)〕=0.8×(13-5.292)=0.8×7.708=6.1664③19.4×0.9+0.1×19.4=19.4×(0.9+0.1)=19.4×1=19.4④147+87+53+11=(147+53)+(87+11)=200+98=298⑤5.6-0.71-0.29=5.6-(0.71+0.29)=...

(1)8.5+1.5×2+1÷0.4=8.5+3+2.5 =(8.5+2.5)+3=11+3=14 (2)6.9×3.6-4.84÷0.4=24.84-12.1=12.74 (3)4.75+8.4÷(9.2-6.8)=4.75+8.4÷2.4=4.75+3.5=8.25(4)1.25×64=(1.25×8)×8=10×8=80 (5)1.9×2.34+1.9×7.66=1.9×(2.34+7.66)=1.9×10=19

①1315÷(14+25),=1315÷1320,=43;②3÷34?34÷3,=4-14,=334;③125×(56+34)+15,=125×56+125×34+15,=2+95+15,=2+(95+15),=2+2,=4;④98%×981+0.02×981,=(98%+0.02)×981,=1×981,=981.

①72.8÷2.5÷4,=72.8÷(2.5×4),=72.8÷10,=7.28;②0.83×7.2+0.83×2.8,=0.83×(7.2+2.8)=0.83×10,=8.3;③18.305÷0.14-58.67,=130.75-58.67,=72.08;④7.8×9.9,=7.8×(10-0.1),=7.8×10-7.8×0.1,=78-0.78,=77.22.

1、①6.54×1.2-1.87 =7.848-1.87 =5.978; ②86.4÷0.24+40 =360+40 =400; ③0.46×1.9+0.54×1.9 =1.9×(0.46+0.54) =1.9×1 =1.9; ④13.65÷0.25÷4 =13.65÷(0.25×4) =13.65÷1 =13.65. 2、其中③ ④可以用简便方法。 3、③的简便方法:乘法分配率:(...

(1)72.8÷5.6+1.49,=13+1.49,=14.49;(2)58.1-29.7÷3,=58.1-9.9,=48.2;(3)30.94-5.09-4.91,=30.94-(5.09+4.91),=30.94-10,=20.94;(4)3.94+34.3×0.2,=3.94+6.86,=10.8;(5)5.4×2.3+5.4×7.7,=5.4×(2.3+7.7),=5.4×10,=5...

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