用递等式计算(能巧算的要巧算)13×102+87125×123×8(537-5002÷61)×12613×29-29×513832÷52+52×

用递等式计算(能巧算的要巧算)13×102+87125×123×8(537-5002÷61)×12613×29-29×513832÷52+52×11(1974+3684)÷(84-38)

(1)13×102+87,
=13×(100+2)+87,
=13×100+13×2+87,
=1300+26+87,
=1300+(26+87),
=1300+113
=1413;

(2)125×123×8,
=(125×8)×123,
=1000×123,
=123000;

(3)(537-5002÷61)×12,
=(537-82)×12,
=455×12,
=5460;

(4)613×29-29×513,
=(613-513)×29,
=100×29,
=2900;

(5)832÷52+52×11,
=16+572,
=588;

(6)(1974+3684)÷(84-38),
=5658÷46,
=123.

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