早教吧 育儿知识 作业答案 考试题库 百科 知识分享

递等式计算,能简便的用简便方法计算0.23×30.2÷1.151.32×10.1-1.32×0.134.8÷2.51÷(1.2-0.125×8)2.84÷(1.6×0.284)0.8×(1.25+1.25+1.25)

题目详情
递等式计算,能简便的用简便方法计算
0.23×30.2÷1.151.32×10.1-1.32×0.134.8÷2.5
1÷(1.2-0.125×8)2.84÷(1.6×0.284)0.8×(1.25+1.25+1.25)
▼优质解答
答案和解析
(1)0.23×30.2÷1.15
=0.23÷1.15×30.2
=0.2×30.2
=6.04
(2)1.32×10.1-1.32×0.1
=1.32×(10.1-0.1)
=1.32×10
=13.2
(3)34.8÷2.5
=(34.8×4)÷(2.5×4)
=139.2÷10
=13.92
(4)1÷(1.2-0.125×8)
=1÷(1.2-1)
=1÷0.2
=5
(5)2.84÷(1.6×0.284)
=2.84÷0.284÷1.6
=10÷1.6
=6.25
(6)0.8×(1.25+1.25+1.25)
=0.8×1.25×3
=1×3
=3