用递等式计算.
①3400-4900÷14×3
②150×108+12000÷48
③640÷(58×28-1304)
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.
用递等式计算.
①3400-4900÷14×3
②150×108+12000÷48
③640÷(58×28-1304)
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.