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1.35除以(1.35乘以0.8)简便脱式计算

(8.1÷0.4+0.5)×0.6 =(8÷0.4+0.1÷0.4+0.5)×0.6 =(20+0.25+0.5)×0.6 =20×0.6+0.25×0.6+0.5×0.6 =12+0.15+0.3 =12.45

4.2×(1.25乘以0.8) =4.2x(1.25x0.8) =4.2x1 =4.2

(1)798+10570÷35,=798+302,=1100;(2)1.8-1÷(0.75+13)×158,=1.8-1÷1312×158,=1.8-1213×138,=1.8-1.5,=0.3;(3)945÷(725×0.6?35÷532),=945÷(11125-9625),=495÷35,=493.

3.5/0.8/0.35 =3.5÷0.35÷0.8 =10÷0.8 =12.5

(1)12.53-1.35×2-9.3,=12.53-2.7-9.3,=12.53-(2.7+9.3),=12.53-12,=0.53;(2)0.8÷(4-3.75)÷0.1,=0.8÷0.25÷0.1,=3.2÷0.1,=32;(3) 4 5 + 11 15 + 3 10 ,= 24 30 + 22 30 + 9 30 ,= 11 6 ;(4)7-( 3 4 - 2 5 ),=7- 7 20 ...

(1)119×(257×2138-515÷413),=109×(197×2138?265×313),=109×(32?65),=109×(1510?1210),=109×310,=13;(2)99.9×98+(0.8-35)×999,=999×9.8+0.2×999,=999×(9.8+0.2),=999×10,=9990;(3)27×1.6÷(10-78÷316),=27×1.6÷(...

算脱式计算 (6.1-4.6)×0.8-1 =1.5×0.8-1 =1.2-1 =0.2

(1)97÷1+35.6+0×6 =97+35.6+0,=132.6;(2)1375+450÷15×25=1375+30×25,=1375-750,=625;(3)[4.5+(13× 3 8 +13× 3 8 )]÷ 5 3 =[4.5+(13× 3 8 ×2)]÷ 5 3 ,=[4.5+9.75]÷ 5 3 ,=14.25× 3 5 ,=8.55;(4)48× 9 16 +48× 7 16 +48×8 =...

(1)5.2×39.8,=5.2×(40-0.2),=5.2×40-5.2×0.2,=208-1.04,=206.96;(2)3.8×1.4+6,=5.32+6,=11.32;(3)270.4÷(41-28.5)÷0.8,=270.4÷12.5÷0.8,=270.4÷(12.5×0.8),=270.4÷10,=27.04.

(53.76-17.6)÷1.8 =36.16÷1.8 =20又4/45 (0.8×7+4.56÷1.9)×12.5 =0.8*12.5*7+2.4*12.5 =0.8*12.5*7+0.8*12.5*3 =10*(7+3) =100 15.73-(2.17+0.73)-1.83 =15.73-0.73-(2.17+1.83) =15-4 =11

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