四年级160道脱式计算带答案,四年级列式计算80道带答案

156×[(17.7-7.2)÷3]

=156×(10.5÷3)

=156×3.5

=546

[37.85-(7.85+6.4)] ×30

=(37.85-7.85-6.4)×30

=(30-6.4)×30

=23.6×30

=708

70×〔(42-42)÷18〕

=70×(0÷18)

=70×0

=0

81÷[(72-54)×9]

=81÷(18×9)

=81÷162

=0.5

960÷(1500-32×45)

=960÷(1500-1440)

=960÷60

=16