递等式计算,能巧算的要验算(中间竖式请列在题目傍边空白处,合理使用空间不要遮盖其他题目数字)先思考是否可以巧算 1358+(442-378)-622 25×58+25+25×41 62×33+2632÷56 101×15+358 104×45÷52 25×(40×6) 532×76÷38 125×8÷125×8 28×25+375÷25 4260÷60×104 796×3+584 207×16+218×64.
(1)1358+(442-378)-622,
=1358+64-622,
=1422-622,
=800;
(2)25×58+25+25×41,
=25×(58+1+41),
=25×100,
=2500;
(3)62×33+2632÷56,
=2046+47,
=2093;
(4)101×15+358,
=(100+1)×15+358,
=100×15+15+358,
=1500+15+358,
=1515+358,
=1873;
(5)104×45÷52,
=104÷52×45,
=2×45,
=90;
(6)25×(40×6),
=25×40×6,
=1000×6,
=6000;
(7)532×76÷38,
=532×(76÷38),
=532×2,
=1064;
(8)125×8÷125×8,
=125÷125×8×8,
=1×8×8,
=64;
(9)28×25+375÷25,
=700+15,
=715;
(10)4260÷60×104,
=71×104,
=71×(100+4),
=71×100+71×4,
=7100+284,
=7384;
(11)796×3+584,
=2388+584,
=2972;
(12)207×16+218×64,
=3312+13952,
=17264.
=1358+64-622,
=1422-622,
=800;
(2)25×58+25+25×41,
=25×(58+1+41),
=25×100,
=2500;
(3)62×33+2632÷56,
=2046+47,
=2093;
(4)101×15+358,
=(100+1)×15+358,
=100×15+15+358,
=1500+15+358,
=1515+358,
=1873;
(5)104×45÷52,
=104÷52×45,
=2×45,
=90;
(6)25×(40×6),
=25×40×6,
=1000×6,
=6000;
(7)532×76÷38,
=532×(76÷38),
=532×2,
=1064;
(8)125×8÷125×8,
=125÷125×8×8,
=1×8×8,
=64;
(9)28×25+375÷25,
=700+15,
=715;
(10)4260÷60×104,
=71×104,
=71×(100+4),
=71×100+71×4,
=7100+284,
=7384;
(11)796×3+584,
=2388+584,
=2972;
(12)207×16+218×64,
=3312+13952,
=17264.
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