问题 解答题

用递等式计算.

①3400-4900÷14×3

②150×108+12000÷48 

③640÷(58×28-1304)

答案

①3400-4900÷14×3

=3400-350×3

=3400-1050

=2350;

②150×108+12000÷48

=1620+250

=1870;

③640÷(58×28-1304)

=640÷(1624-1304)

=640÷320

=2.

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