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8.5%(3.6+6.8)÷1.3

8.5-(3.6+6.8)÷1.3 =8.5-(3.2+6.8+0.4)➗1.3 =8.5-10.4➗1.3 =8.5-8 =0.5

8.5-(3.6+6.8)÷1.3 =8.5-10.4÷1.3 =8.5-8 =0.5 没有简便方法,直接计算

8.5-(3.6+ 6.8)/1.3脱式计算 =8.5-10.4÷1.3 =8.5-8 =0.5

(1)[8.5-(3.6+3.6)]÷2.6=[8.5-7.2]÷2.6=1.3÷2.6=0.5;(2)10.1×87=(10+0.1)×87=10×87+0.1×87=870+8.7=878.7;(3)1.4×[(7.5+38.4)÷0.9]=1.4×[45.9÷0.9]=1.4×51=71.4.

[3.6÷0.6-(1.2÷0.6)÷0.8÷0.6] =6-(2÷4/3) =6-3/2 =4又1/2

6.8+1.25×6.8×8 =6.8+1.25×8×6.8 =6.8+68 =74.8 所以原式的计算结果为74.8

7.8×6.4+3.6×1.3+3.6×6.5 =7.8×6.4+3.6×(6.5+1.3) =7.8x6.4+3.6x7.8 =7.8x(6.4+3.6) =7.8x10 =78

(1)31.7÷0.63≈50.32;(2)2.4×1.5+3.6÷1.5=3.6+2.4,=6;(3)0.32×0.25+0.08÷4=0.08+0.08÷4,=0.08+0.02,=0.08+0.02,=0.1;(4)(9.6+1.48÷3.7)÷8=(9.6+0.4)÷8,=10÷8,=1.25;(5)5.8÷[4×(1.34-0.14)]=5.8÷[4×1.2],=5.8÷4.8,≈1...

(1)436-303=133,(2)538+98=636,(3)5.4+3.6=9,(4)1.3-0.7=0.6,(5)20×70=1400,(6)36÷4÷9=1,(7)8.2+0.54+0.46=9.2,(8)25×26×4=2600.

很高兴为你解答~ 解:6.8X=17.2-3.6 6.8X=13.6 解得 X=2 希望我的回答能够帮助到你,谢谢~

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