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解法如下：

(1) =8470-(100+4)*65=8470-100*65-4*65=8470-6500-260=1710

(2) =1681÷(43*2-4)=(41*41)/(41*2)=41/2=20.5

(3) =3.64÷4+4.36÷4=(3.64+4.36)÷4=8÷4=2

(4) =(4/4-3/4+1/5)÷4=(1/4+1/5)÷4=9/20÷4=9/80

(5) =7.5×(46.7+52.3+1)=7.5×100=750

(6) =3/8*24+5/6*24-7/12*24=9+20-14=15

(7) =9.43+8.57-(2.6+3.4)=18-6=12

需要验证是否正确，只要将式子复制到百度火鹤谷歌就能直接看到答案。

（1）8470-104×65
=8470-100*65-4*65
=8470-6500-130
=1970-130
=1840
（2）168.1÷（4.3×2-0.4）
=168.1÷（4.3×2-0.2×2）
=168.1÷（4.1×2）
=168.1÷4.1÷2
=41÷2
=20.5
（3）3.64÷4+4.36×0.25
=（3.64+4.36）÷4
=8÷4
=2
（4）[4/4-(3/4-1/5)]÷4
=（4/4-3/4+1/5)÷4
=（1/4+1/5）÷4
=9/20÷4
=9/80
（5）7.5×46.7+52.3×7.5+7.5
=7.5×（46.7+52.3+1）
=7.5×100
=750
（6）（3/8+5/6-7/12)×24
=3/8×24+5/6×24-7/12×24
=9+20-14
=15
（7）9.43-2.6+8.57-3.4
=（9.43+8.57）-（2.6+3.4）
=18