一、计算下列各题,能简便的简便(递等式计算,每个步骤详细) 2.25×4.8+77.5×0.48

2024-11-20 09:19:11
推荐回答(3个)
回答(1):

2.25×4.8+77.5×0.48
=2.25×4.8﹢7.75×10×0.48
=2.25×4.8﹢7.75×4.8
=(2.25+7.75)×4.8
=10×4.8
=48
63×9分之7-9分之2×63
=63×(7/9-2/9)
=63×1
=63
4÷2分之1×(8分之5-4分之1)
=8×(5/8-1/4)
=8×5/8-8×1/4
=5-2
=3
(17分之8+13分之8)×8分之13×8分之17
=8/17×13/8×17/8+8/13×13/8×17/8
=13/8+17/8
=30/8
=15/4

回答(2):

2.25×4.8+77.5×0.48
=0.48×(22.5+77.7)
=0.48×100
=48;
63×9分之7-9分之2×63
=63×(7/9-2/9)
=63×(5/9)
=7×5
=35;
4÷2分之1×(8分之5-4分之1)
=4×2×(5/8-1/4)
=8×(5/8)-8×(1/4)
=5-2
=3;
(17分之8+13分之8)×8分之13×8分之17
=(8/17)×(13/8)×(17/8)+(8/13)×(13/8)×(17/8)
=13/8+17/8
=30/8
=15/4;
如果本题有什么不明白可以追问,如果满意记得采纳
如果有其他问题请采纳本题后另发点击向我求助,答题不易,请谅解,谢谢。
祝学习进步

回答(3):

解:
2.25×4.8+77.5×0.48
=2.25×4.8+7.75×4.8
=(2.25+7.75)x4.8
=10x4.8
=48

63×9分之7-9分之2×63
=63x(7/9-2/9)
=63x5/9
=7x5
=35

4÷2分之1×(8分之5-4分之1)
=4x2x(5/8-2/8)
=8x3/8
=3

(17分之8+13分之8)×8分之13×8分之17
=8/17×13/8×17/8 + 8/13×13/8×17/8
=(8/17×17/8)×13/8 + (8/13×13/8)×17/8
=13/8+17/8
=30/8
=15/4