脱式计算:8×3889×125224×25-25×2476×298+76×3-76630×〔840÷(240-212)〕〔458-(85+28)〕÷23

2025-02-05 18:11:09
推荐回答(1个)
回答1:

8×3889×125,
=8×125×3889,
=1000×3889,
=3889000;
224×25-25×24,
=25×(224-24),
=25×200,
=5000;
76×298+76×3-76,
=76×(298+3-1),
=76×300,
=22800;
630×〔840÷(240-212)〕,
=630×(840÷28),
=630×30,
=18900;
[458-(85+28)]÷23,
=(458-85-28)÷23,
=345÷23,
=15.