46.5+1点99+7.8脱式计算

2025-03-26 17:28:30
推荐回答(1个)
回答1:

(1)46.5×99+46.5,
=46.5×(99+1),
=46.5×100,
=4650;

(2)4.85×1.25×8,
=4.85×(1.25×8),
=4.85×10,
=48.5;

(3)(455-12.5×4)÷8.1,
=(455-50)÷8.1,
=405÷8.1,
=50;

(4)39÷0.125÷0.8,
=39÷(0.125×0.8),
=39÷0.1,
=390.