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168.1除(4.5乘2减0.8)简便31减[0.5乘(6减5.7)加18]简便360除15减2.5乘1.6简便[(6.1减4.6)除0.8减1]乘0.4简便
题目详情
168.1除(4.5乘2减0.8)简便 31减[0.5乘(6减5.7)加18]简便
360除15减2.5乘1.6简便 [ (6.1减4.6)除0.8减1]乘0.4简便
360除15减2.5乘1.6简便 [ (6.1减4.6)除0.8减1]乘0.4简便
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答案和解析
168.1÷(4.5乘0.2减0.8)
=168.1÷(0.9-0.8)
=168.1÷0.1
=1681
31减[0.5乘(6减5.7)加18]
=31-[0.5×0.3+18]
=31-18-0.15
=13-0.15
=12.85
360÷15减2.5乘1.6
=360÷3÷5-2.5×4×0.4
=120÷5-10×0.4
=24-4
=20
[ (6.1减4.6)÷0.8减1]乘0.4
=[1.5÷0.8-1】×0.4
=[15/8-1]×0.4
=7/8×0.4
=0.35
=168.1÷(0.9-0.8)
=168.1÷0.1
=1681
31减[0.5乘(6减5.7)加18]
=31-[0.5×0.3+18]
=31-18-0.15
=13-0.15
=12.85
360÷15减2.5乘1.6
=360÷3÷5-2.5×4×0.4
=120÷5-10×0.4
=24-4
=20
[ (6.1减4.6)÷0.8减1]乘0.4
=[1.5÷0.8-1】×0.4
=[15/8-1]×0.4
=7/8×0.4
=0.35
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