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脱式计算(能简便算的要简便算) ...

(1)0.01+1.01×99,=0.01+1.01×(100-1),=0.01+1.01×100-1.01×1,=101+0.01-1.01,=100;(2)26×20.2-8.4-1.8,=26×(20+0.2)-(8.4+1.8),=520+5.2-10.2,=525.2-10.2,=515;(3)89.3×43+38×89.3+893×1.9,=89.3×43+38×89.3+89.3×19,=...

(1)900-300÷60=900-5=895;(2)16×30÷40 =480÷40=12;(3)750÷(23+27)=750÷50=15;(4)270÷6÷5 =270÷(6×5)=270÷30=9;(5)720÷4×9 =180×9=1620;(6)210÷35=210÷(7×5)=210÷7÷5=30÷5=6.

(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...

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...

(1)1.01+1.01×99,=1.01×(1+99),=1.01×100,=101;(2)1.25×7.85×0.8,=1.25×0.8×7.85,=1×7.85,=7.85;(3)25×32×1.25,=25×4×8×1.25,=(25×4)×(8×1.25),=100×10,=1000;(4)10.1×101,=10.1×(100+1),=10.1×100+1.01×1,=10...

(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.

计算下面各题. 1.280+840÷24×5 2.85×(95-1440÷24) 3.58870÷(105+20×2) 4.80400-(4300+870÷15) 5.1437×27+27×563 6.81432÷(13×52+78) 7.125×(33-1) 8.37.4-(8.6+7.24-6.6)

(1)3×(150-1530÷15)=3×(150-102)=3×48=144;(2)[1-(12-14)]×23=[1-14]×23=12;(3)(1-0.95)÷0.01=0.05÷0.01=5;(4)1115+(415+59)=(1115+415)+59=1+59=159;(5)3.72×99+3.72=3.72×(99+1)=3.72×100=372;(6)111139×140=1...

①25×27×4,=(25×4)×27,=2700;②54×101,=54×(100+1),=5400+54,=5454;③23×52+52×77,=52×(23+&7),=52×100,=5200;④(36×54-984)÷24,=(1944-984)÷24,=960÷24,=40;⑤150÷[90÷(67-52)],=150÷[90÷15],=150÷6,=25.

396×123 =(400-4)×123 =49200-492 =48708 3.96×12.3 =(4-0.04)×12.3 =49.2-0.492 =48.708 568+44+32 =(568+32)+44 =600+44 =644 125×768×8 =(125×8)×768 =1000×768 =768000 1.25×76.8×0.8 =(1.25×0.8)×76.8 =1×76.8 =76.8 99×38 =(100-1)×38 =38...

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