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脱式计算(能简算的要简算) ( 4 5 ...

(1)17.64÷4.9+6.73=3.6+6.73=10.33(2)5.6×13.9+0.44×139=0.56×139+0.44×139=(0.56+0.44)×139=1×139=139(3)48×1.02÷3.4=48.96÷3.4=14.4(4)0.25×12.5×320=0.25×12.5×8×40=(0.25×40)×(12.5×8)=10×100=1000

(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)【...

①14.37-5.63-4.37,=14.37-(5.63+4.37),=14.37-10,=4.37;②5÷13+27×113+713,=513+2713+713,=3;③117×49+517×19,=117×49+117×59,=117×(49+59),=117;④56×[(34-12)÷35],=56×[14×53],=56×512,=2572.

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-...

①12.5×0.4×2.5×8=(12.5×8)×(0.4×2.5)=100×1=100②9.5×101=9.5×(100+1)=9.5×100+9.5=959.5③43.2-1.8×3-4.6=43.2-5.4-4.6=43.2-(5.4+4.6)=33.2④4.2×7.8+2.2×4.2=4.2×(7.8+2.2)=4.2×10=42⑤0.87×3.16+4.64=2.7492+4.64=7.3892⑥12.5×4.8=12....

5.44÷(1.25×0.8)=5.44÷1 0.4÷0.4×5×5=25 第二个没有简便方法

(1)49×[34-(716-14)]=49×[34-316]=49×916=14;(2)6.25×0.56+58×3.4+5×18=6.25×0.56+58×3.4+5×18=0.625×5.6+0.625×3.4+0.625=0.625×(5.6+3.4+1)=0.625×10=6.25;(3)6.72-2.3÷0.5×0.8=6.72-4.6×0.8=6.72-3.68=3.04;(4)2007÷200720072...

(1)128+306÷17×9=128+18×9=128+162=290;(2)25×33×4×2 =(25×4)×(33×2)=100×66=6600;(3)156+6.2-15.6+6.2=162.2-15.6+6.2=146.6+6.2=152.8;(4)70-29.6-10.4=70-(29.6+10.4)=70-40=30;(5)132×75-75×32 =(132-32)×75=100×75=7...

(1)9.07-22.78÷1.7=9.07-13.4=-4.33(2)1.05÷0.7+18.9=1.5+18.9=20.4(3)21.5÷0.05×0.96=430×0.96=412.8(4)0.4×5÷0.4×5=0.4÷0.4×5×5=1×5×5=25(5)(7.5-2.3×0.4)÷0.01=(7.5-0.92)÷0.01=6.58÷0.01=658(6)10÷4÷12.5=10÷(4×12.5)=10÷...

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