递等式计算,能简便的要简便.283+17×50 64000÷250 &nb...
递等式计算,能简便的要简便.283+17×5064000÷25047×53+47×473100÷627500÷(25×15)300-[(195-168)×15-195]5...
递等式计算,能简便的要简便.283+17×50 64000÷250 47×53+47×47 3100÷627500÷(25×15)300-[(195-168)×15-195]532-149-241
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(1)283+17×50
=283+850
=1133;
(2)64000÷250
=64×(1000÷250)
=64×4
=256;
(3)47×53+47×47
=47×(53+47)
=47×100
=4700;
(4)3100÷62
=3100÷31÷2
=100÷2
=50;
(5)7500÷(25×15)
=7500÷25÷15
=300÷15
=20;
(6)300-[(195-168)×15-195]
=300-[27×15-195]
=300-[405-195]
=300-210
=90;
(7)532-149-241
=532-(149+241)
=532-290
=242.
=283+850
=1133;
(2)64000÷250
=64×(1000÷250)
=64×4
=256;
(3)47×53+47×47
=47×(53+47)
=47×100
=4700;
(4)3100÷62
=3100÷31÷2
=100÷2
=50;
(5)7500÷(25×15)
=7500÷25÷15
=300÷15
=20;
(6)300-[(195-168)×15-195]
=300-[27×15-195]
=300-[405-195]
=300-210
=90;
(7)532-149-241
=532-(149+241)
=532-290
=242.
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