问题描述:
脱式计算,怎么简便就怎么算.415-176-24 | 15×27-3000÷25 | 8.29+3.7+0.71+6.3 |
125×89×8 | 428×78+572×78 | 5625÷75+25. |
最佳答案:
(1)415-176-24,
=415-(176+24),
=415-200,
=215;
(2)15×27-3000÷25,
=405-120,
=285;
(3)8.29+3.7+0.71+6.3,
=(8.29+0.71)+(3.7+6.3),
=9+10,
=19;
(4)125×89×8,
=(125×8)×89,
=1000×89,
=89000;
(5)428×78+572×78,
=(428+572)×78,
=1000×78,
=78000;
(6)5625÷75+25,
=75+25,
=100.