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脱式计算,能简算的要简算(1)5.6÷0.14÷4; ...

(1)5.6÷0.14÷4=5.6÷(0.14×4)=5.6÷0.56=10 (2)147+89+53+11=(147+53)+(89+11)=200+100=300(3)5.6-0.71-0.29=5.6-(0.71+0.29)=5.6-1=4.6 (4)3.5×2.34+3.5×7.66=3.5×(2.34+7.66)=3.5×10=35

(1)13.4+5.62+17.6+4.38,=(13.4+17.6)+(5.62+4.38),=31+10,=41.(2)3.4÷[(1.2+0.5)×5],=3.4÷[1.7×5],=3.4÷8.5,=0.4.(3)0.75×18÷0.15,=13.5÷0.15,=90.(4)2.5×3.2×1.25,=(2.5×0.4)×(8×1.25),=1×10,=10.

(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)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)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...

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)130÷0.4÷2.5 =130÷(0.4×2.5)=130÷1=130(2)5.4×101=5.4×(100+1)=5.4×100+1×5.4=545.4(5)1.6×55.4-55.4×0.6=(1.6-0.6)×55.4=1×55.4=55.4(6)0.5×37×0.2=0.5×0.2×37=0.1×37=3.7

脱式计算能简算的要简算 0.25x32x12.5 =(0.25×4)×(8×12.5) =1×100 =100 2/5x68+0.4x32 =0.4×(68+32) =0.4×100 =40 14/5÷(14/5+7/10) =14/5÷7/2 =4/5 (2/3+4/15x5/6)÷10/21 =(2/3+2/9)÷10/21 =8/9÷10/21 =28/15 1-5/8÷25/28-3/10 =1-...

(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×...

(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...

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