ldcf.net
当前位置:首页 >> 脱式计算(能用简便计算的要用简便计算). ... >>

脱式计算(能用简便计算的要用简便计算). ...

3.8*0.25+2.05=1.9*2*0.25+2.05=1.9*0.5+2.05=0.95+2.05=3 1.25*99=1.25*(100-1)=1.25*100-1.25=125-1.25=123.75

(1)13.6×3-40.6÷2,=40.8-20.3,=20.5;(2) 99×0.75+ 1 4 ×99 ,=99×(0.75+0.25),=99×1,=99;(3) ( 5 6 - 5 8 )×24 ,= 5 6 ×24- 5 8 ×24,=20-15,=5;(4) 121×100 1 121 ,=121×(100+ 1 121 ),=121×100+121× 1 121 ,=12100+1...

(1)10.1×87=(10+0.1)×87=10×87+0.1×87 =870+8.7=878.7; (2)2.3+2.99÷(22-19.7)=2.3+2.99÷2.3=2.3+1.3=4.6;(3)2.65×1.7+1.35×1.7 =(2.65+1.35)×1.7=4×1.7=6.8;(4)6.3+0.84+3.7+8.16=(6.3+3.7)+(8.16+0.84)=10+9=19;(5)18...

(1)24×10.5-3549÷39,=24×(10+0.5)-91,=240+12-91,,=252-91,=161;(2)710÷[(35?14)×12],=710÷[(1220-520)×12],=710÷[720×12],=710÷215,=710×521,=16;(3)2-58÷2528-310,=2-58×2825-310,=2-710-310,=2-(710+310),=2-1...

(8/9-1/3)÷(7/18×2/3) =(8/9-1/3)÷7/27 =8/9×27/7-1/3×27/7 =24/7-9/7 =15/7 =2又1/7

(1)2.5×(6+5×3.2)=2.5×(6+16)=2.5×22=55;(2)45×7.3+27×4.5=45×7.3+2.7×45=45×(7.3+2.7)=45×10=450; (3)5.8×101-5.8=5.8×(101-1)=5.8×100=580;(4)0.125×3.2×25=0.125×(8×0.4)×25=(0.125×8)×(0.4×25)=1×10=10;(5)[8.3...

666÷9用脱式计算 =666÷3÷3 =222÷3 =74

(1)62×7.1+2.9,=440.2+2.9,=443.1;(2)4.2×0.25,=(4+0.2)×0.25,=4×0.25+0.2×0.25,=1+0.05,=1.05;(3)5.2×4.3+0.8×4.3,=(5.2+0.8)×4.3,=6×4.3,=25.8.

①11.23-3.4+8.77-6.6=11.23+8.77-(3.4+6.6)=20-10=10;②5.4÷[0.68÷(1.2-1.03)]=5.4÷[0.68÷0.17]=5.4÷4=1.35;③(3.24×99+3.24)÷8.1 =[3.24×(99+1)]÷8.1=324÷8.1=40;④(18.4-3.75)÷12.5÷0.8=14.65÷12.5÷0.8=14.65÷(12.5×0.8)=14.65÷10...

50×25×20×40用简便运算怎么算还要用脱式计算 50×25×20×40 =(50*20)*(25*40) =1000*1000 =1000000

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