11.9×9.5+23.8×0.25用简便方法怎么做?

2024-12-17 19:35:18
推荐回答(2个)
回答1:

原式=(12-0.1)×9.5+23.8×1/4
=12×9.5-0.95+5.95
=12×9.5+5
=(10+2)×9.5+5
=95+2×9.5+5
=119

回答2:

原式等于11.9×(10-0.5)+23.8×(1÷4)
=11.9×10-11.9×0.5+23.8×1÷4
=119-5.95+5.95
=119