（2012•师宗县模拟）用递等式计算（能简算的请简算）．①646+136÷17×25②44×（511-14）③7.5×46.7+52.3×7.5+7.5④（2-34×45）÷13⑤1219÷15+115×719⑥[（45-14）×611]÷920．

Question

（2012•师宗县模拟）

用递等式计算（能简算的请简算）． ①646+136÷17×25	②44×（(5)/(11)-(1)/(4)）
③7.5×46.7+52.3×7.5+7.5	④（2-(3)/(4)×(4)/(5)）÷(1)/(3)
⑤(12)/(19)÷15+(1)/(15)×(7)/(19)	⑥[（(4)/(5)-(1)/(4)）×(6)/(11)]÷(9)/(20)．

用递等式计算（能简算的请简算）． ①646+136÷17×25	②44×（(5)/(11)-(1)/(4)）
③7.5×46.7+52.3×7.5+7.5	④（2-(3)/(4)×(4)/(5)）÷(1)/(3)
⑤(12)/(19)÷15+(1)/(15)×(7)/(19)	⑥[（(4)/(5)-(1)/(4)）×(6)/(11)]÷(9)/(20)．

用递等式计算（能简算的请简算）．
①646+136÷17×25
②44×（(5)/(11)-(1)/(4)）用递等式计算（能简算的请简算）．
①646+136÷17×25

②44×（(5)/(11)-(1)/(4)）
(5)/(11)-(1)/(4)）(5)/(11)551111(1)/(4)）(1)/(4)1144 ③7.5×46.7+52.3×7.5+7.5 ④（2-(3)/(4)×(4)/(5)）÷(1)/(3)③7.5×46.7+52.3×7.5+7.5④（2-(3)/(4)×(4)/(5)）÷(1)/(3)(3)/(4)×(4)/(5)）÷(1)/(3)(3)/(4)3344(4)/(5)）÷(1)/(3)(4)/(5)4455(1)/(3)(1)/(3)1133 ⑤(12)/(19)÷15+(1)/(15)×(7)/(19) ⑥[（(4)/(5)-(1)/(4)）×(6)/(11)]÷(9)/(20)．⑤(12)/(19)÷15+(1)/(15)×(7)/(19)(12)/(19)÷15+(1)/(15)×(7)/(19)(12)/(19)12121919(1)/(15)×(7)/(19)(1)/(15)111515(7)/(19)(7)/(19)771919⑥[（(4)/(5)-(1)/(4)）×(6)/(11)]÷(9)/(20)．(4)/(5)-(1)/(4)）×(6)/(11)]÷(9)/(20)．(4)/(5)4455(1)/(4)）×(6)/(11)]÷(9)/(20)．(1)/(4)1144(6)/(11)]÷(9)/(20)．(6)/(11)661111(9)/(20)．(9)/(20)992020

Answer 1

（1）646+136÷17×25，=646+8×25，=646+200，=846；（2）44×（511-14），=44×511-44×14，=20-11，=9；（3）7.5×46.7+52.3×7.5+7.5，=7.5×（46.7+52.3+1），=7.5×100，=750；（4）（2-34×45）÷13，=（2-35...