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递等式计算(能巧算的要巧算)723-(223+311)-89(75+25×40)÷25602×110-110-11032×32+32×69-32[1178-12×(84+5)]÷5125×(25×48)
题目详情
递等式计算(能巧算的要巧算)
723-(223+311)-89
(75+25×40)÷25
602×110-110-110
32×32+32×69-32
[1178-12×(84+5)]÷5
125×(25×48)
723-(223+311)-89
(75+25×40)÷25
602×110-110-110
32×32+32×69-32
[1178-12×(84+5)]÷5
125×(25×48)
▼优质解答
答案和解析
(1)723-(223+311)-89
=(723-223)-(311+89)
=500-400
=100;
(2)(75+25×4)÷25
=(75+100)÷25
=175÷25
=7;
(3)602×110-110-110
=110×(602-1-1)
=110×600
=66000;
(4)32×32+32×69-32
=32×(32+69-1)
=32×100
=3200;
(5)[1178-12×(84+5)]÷5
=[1178-12×89]÷5
=[1178-1068]÷5
=110÷5
=22;
(6)125×(25×48)
=125×25×(8×6)
=(125×8)×(25×6)
=1000×150
=150000.
=(723-223)-(311+89)
=500-400
=100;
(2)(75+25×4)÷25
=(75+100)÷25
=175÷25
=7;
(3)602×110-110-110
=110×(602-1-1)
=110×600
=66000;
(4)32×32+32×69-32
=32×(32+69-1)
=32×100
=3200;
(5)[1178-12×(84+5)]÷5
=[1178-12×89]÷5
=[1178-1068]÷5
=110÷5
=22;
(6)125×(25×48)
=125×25×(8×6)
=(125×8)×(25×6)
=1000×150
=150000.
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