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4道递等式计算(能简则简)11.72+7.85-(1.72-0.15)1.8÷0.36(13.5-13.5÷15)÷0.0513.8×7.6-(4.29+3.31)×8.8

题目详情
4道递等式计算(能简则简)
11.72+7.85-(1.72-0.15) 1.8÷0.36
(13.5-13.5÷15)÷0.05 13.8×7.6-(4.29+3.31)×8.8
▼优质解答
答案和解析
11.72+7.85-(1.72-0.15)
=11.72-1.72+7.85+0.15
=10+8
=18
1.8÷0.36
=1.8÷0.18÷2
=100÷2
=50
(13.5-13.5÷15)÷0.05
=(13.5-0.9)×20
=12.6×20
=252
13.8×7.6-(4.29+3.31)×8.8
=13.8×7.6-7.6×8.8
=7.6×(13.8-8.8)
=7.6×5
=38