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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

8.5-10.4/1.3=8.5-8=0.5

除法那部分先提取公因式 (8.1-5.4)÷3.6 = (0.9 x 9 - 0.9 x 6)÷ (0.9 x 4)= 0.9 x (9 - 6) ÷ (0.9 x 4)= 0.9 x (9 - 6) ÷ 0.9 ÷ 4= (9 - 6) ÷ 4= 0.75 (8.1-5.4)÷3.6+85.7= 0.75 + 85.7= 85 + 0.7 + 0.75= 85 + (0.7 + 0.75)= 85 + 1.45= ...

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

3.5×[6.8-(1.6+3.6÷0.9)]÷84 =3.5*(6.8-5.6)*1/84 =3.5*1.2*1/84 =4.2*1/84 =42*1/84*1/10 =1/20

解:(1)1.3+2.7=4 (2)6-2.5=3.5 (3)0.57+5.7=6.27 (4)3.6-0.03=3.57 (5)2.4+6.06=8.46 (6)8-1.95=6.05 (7)27÷1000=0.027 (8)0.05×100=5 (9)25×12=300 (10)1×0÷1=0 (11)5.76÷100=0.0576 (12)1÷0.1-1+0.1=9.1

(1)293+720÷45×12,=293+16×12,=293+192,=485;(2)14÷(3-513-813),=14÷[3-(513+813)],=14÷[3-1],=14÷2,=18;(3)8.2-(3.6+6.8)÷26,=8.2-10.4÷26,=8.2-0.4,=7.8;(4)(0.75-316)×(29+13),=(34-316)×(29+13),=916×...

①6.9×3.6-4.84÷0.4,=24.84-12.1,=12.74;②4.75+8.4÷(9.2-6.8),=4.75+8.4÷2.4,=4.75+3.5,=8.25;③1.2÷[2.5×(4.3-2.7)],=1.2÷[2.5×1.6],=1.2÷4,=0.3;④4.5×(0.75-0.356)+9.23,=4.5×0.394+9.23,=1.773+9.23,=11.003;⑤0.88÷0.8+3...

(1)3.1+2.4+1.9+3.6,=(3.1+1.9)+(2.4+3.6),=5+6,=11;(2)300-288÷24,=300-12,=288;(3)48×( 3 8 + 5 6 ),=48× 3 8 +48× 5 6 ,=18+40,=58;(4)0.46×98+0.92,=0.46×(100-2)+0.92,=0.46×100-0.46×2+0.92,=46-0.92+0.92...

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