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用递等式计算下面各题,能简便的要简便25×102125×32×2553×25+530×7.51.375+0.35+2.654.8+5.07+2.2+4.93103×99+103
题目详情
用递等式计算下面各题,能简便的要简便
25×102 125×32×25 53×25+530×7.5 1.375+0.35+2.65 4.8+5.07+2.2+4.93 103×99+103 12×(324-285)÷26 25×102 125×32×25 53×25+530×7.5 25×102 125×32×25 53×25+530×7.5 1.375+0.35+2.65 4.8+5.07+2.2+4.93 103×99+103 1.375+0.35+2.65 4.8+5.07+2.2+4.93 103×99+103 12×(324-285)÷26 12×(324-285)÷26
25×102 | 125×32×25 | 53×25+530×7.5 |
1.375+0.35+2.65 | 4.8+5.07+2.2+4.93 | 103×99+103 |
12×(324-285)÷26 |
25×102 | 125×32×25 | 53×25+530×7.5 |
1.375+0.35+2.65 | 4.8+5.07+2.2+4.93 | 103×99+103 |
12×(324-285)÷26 |
▼优质解答
答案和解析
(1)25×102
=25×(100+2)
=25×100+25×2
=2500+50
=2550;
(2)125×32×25
=125×(4×8)×25
=(125×8)×(4×25)
=1000×100
=100000;
(3)53×25+530×7.5
=53×25+53×75
=53×(25+75)
=53×100
=5300;
(4)1.375+0.35+2.65
=1.375+(0.35+2.65)
=1.375+3
=4.375;
(5)4.8+5.07+2.2+4.93
=(4.8+2.2)+(5.07+4.93)
=7+10
=17;
(6)103×99+103
=103×(99+1)
=103×100
=10300;
(7)12×(324-285)÷26
=12×39÷26
=468÷26
=18.
=25×(100+2)
=25×100+25×2
=2500+50
=2550;
(2)125×32×25
=125×(4×8)×25
=(125×8)×(4×25)
=1000×100
=100000;
(3)53×25+530×7.5
=53×25+53×75
=53×(25+75)
=53×100
=5300;
(4)1.375+0.35+2.65
=1.375+(0.35+2.65)
=1.375+3
=4.375;
(5)4.8+5.07+2.2+4.93
=(4.8+2.2)+(5.07+4.93)
=7+10
=17;
(6)103×99+103
=103×(99+1)
=103×100
=10300;
(7)12×(324-285)÷26
=12×39÷26
=468÷26
=18.
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