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脱式计算,能简算的要简算(1)5.6÷0.14÷4; ...

(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)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)4.75+8.4÷(9.2-6.8)=4.75+8.4÷2.4=4.75+3.5=8.25(2)1.2÷[2.5×(4.3-2.7)]=1.2÷[2.5×1.6]=1.2÷4=0.3(3)3.4×5.9+5.9×5.6+5.9=(3.4+5.6+1)×5.9=10×5.9=59

(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...

(1)6.72-2.3÷0.5×0.8=6.72-4.6×0.8=6.72-3.68=3.04;(2)98?17+18?67=(98+18)-(17+67)=54-1=14;(3)910÷[12×(65?310)]=910÷[12×910]=910÷920=910×209=2;(4)6.25×0.56+58×3.4+5×18=0.625×5.6+58×3.4+58=58×5.6+58×3.4+58=58×(5.6+...

(1)(12.5+7.5)÷0.25 =20÷0.25=80(2)2÷85×254=2×58×254=71316(3)13.1×56+5.6×69=131×5.6+5.6×69=5.6×(131+69)=5.6×200=1120(4)2.8+[2.4÷(90-60)]=2.8+[2.4÷30]=2.8+0.08=2.88

(1)8.5+1.5×2+1÷0.4=8.5+3+2.5 =(8.5+2.5)+3=11+3=14 (2)6.9×3.6-4.84÷0.4=24.84-12.1=12.74 (3)4.75+8.4÷(9.2-6.8)=4.75+8.4÷2.4=4.75+3.5=8.25(4)1.25×64=(1.25×8)×8=10×8=80 (5)1.9×2.34+1.9×7.66=1.9×(2.34+7.66)=1.9×10=19

(1)6.72-2.3÷0.5×0.8=6.72-4.6×0.8=6.72-3.68=3.04;(2)98-17+18-67=(98+18)-(17+67)=54-1=14;(3)910÷[12×(65-310)]=910÷[12×910]=910÷920=2;(4)(27+15)×7×5=27×7×5+15×7×5=10+7=17.

(1)17.64÷4.9+6.73=3.6+6.73,=10.33;(2)3.4÷[(1.2+0.5)×5]=3.4÷[1.7×5],=3.4÷1.7÷5,=2÷5,=0.4;(3)1.9+19.9+199.9+0.3=1.9+19.9+199.9+0.1+0.1+0.1,=(1.9+0.1)+(19.9+0.1)+(199.9+0.1),=2+20+200,=222;(4)0.25×12.5×3....

7.2/0.25/0.4 =7.2/(0.25x0.4) =7.2/0.1 =72 如有帮助请采纳, 如对本题有疑问可追问,Good luck!

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