
简便计算19.57-2.37-3.63 37.7-(8.98+7.7)13.6-4.25-5.75+6.43900÷25÷4 &nbs...
简便计算19.57-2.37-3.6337.7-(8.98+7.7)13.6-4.25-5.75+6.43900÷25÷457×9941000÷(41×5)45×64+4...
简便计算19.57-2.37-3.63 37.7-(8.98+7.7)13.6-4.25-5.75+6.43900÷25÷4 57×99 41000÷(41×5)45×64+45×35+45 89×11+12×11-11 125×808.
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(1)19.57-2.37-3.63
=19.57-(2.37+3.63)
=19.57-6
=13.57;
(2)37.7-(8.98+7.7)
=37.7-7.7-8.98
=30-8.98
=21.02;
(3)13.6-4.25-5.75+6.4
=(13.6+6.4)-(4.25+5.75)
=20-10
=10;
(4)3900÷25÷4
=3900÷(25×4)
=3900÷100
=39;
(5)57×99
=57×(100-1)
=57×100-57×1
=5700-57
=5643;
(6)41000÷(41×5)
=41000÷41÷5
=1000÷5
=200;
(7)45×64+45×35+45
=45×(64+35+1)
=45×100
=4500;
(8)89×11+12×11-11
=11×(89+12-1)
=11×100
=1100;
(9)125×808
=125×(800+8)
=125×800+125×8
=100000+1000
=101000.
=19.57-(2.37+3.63)
=19.57-6
=13.57;
(2)37.7-(8.98+7.7)
=37.7-7.7-8.98
=30-8.98
=21.02;
(3)13.6-4.25-5.75+6.4
=(13.6+6.4)-(4.25+5.75)
=20-10
=10;
(4)3900÷25÷4
=3900÷(25×4)
=3900÷100
=39;
(5)57×99
=57×(100-1)
=57×100-57×1
=5700-57
=5643;
(6)41000÷(41×5)
=41000÷41÷5
=1000÷5
=200;
(7)45×64+45×35+45
=45×(64+35+1)
=45×100
=4500;
(8)89×11+12×11-11
=11×(89+12-1)
=11×100
=1100;
(9)125×808
=125×(800+8)
=125×800+125×8
=100000+1000
=101000.
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