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脱式计算.6.5+7.2÷1.8-4.5=5.6×12.5×0.8=70.8-5.25-4.75=1.82÷0.13×0.7=8÷[(9-8.89)×2.5]=0.65×7.8+0.35×7.8=

题目详情
脱式计算.
6.5+7.2÷1.8-4.5=5.6×12.5×0.8=70.8-5.25-4.75=
1.82÷0.13×0.7=8÷[(9-8.89)×2.5]=0.65×7.8+0.35×7.8=
▼优质解答
答案和解析
(1)6.5+7.2÷1.8-4.5
=6.5+4-4.5
=10.5-4.5
=6;

(2)5.6×12.5×0.8
=5.6×(12.5×0.8)
=5.6×10
=56;

(3)70.8-5.25-4.75
=70.8-(5.25+4.75)
=70.8-10
=60.8;

(4)1.82÷0.13×0.7
=14×0.7
=9.8;

(5)8÷[(9-8.89)×2.5]
=8÷[0.11×2.5]
=8÷0.275
=
320
11


(6)0.65×7.8+0.35×7.8
=(0.65+0.35)×7.8
=1×7.8
=7.8.