计算下面各题,能简算的要简算.24.9+40.6-42.5 ...
计算下面各题,能简算的要简算.24.9+40.6-42.5440.98-(87.4+161.57)19.92+15.4-9.925.6+2.7+4.412.36-5.64...
计算下面各题,能简算的要简算.24.9+40.6-42.5 440.98-(87.4+161.57) 19.92+15.4-9.92 5.6+2.7+4.4 12.36-5.64-4.36 35.76-6.75+2.1.
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(1)24.9+40.6-42.5
=65.5-42.5
=23;
(2)440.98-(87.4+161.57)
=440.98-248.97
=192.01;
(3)19.92+15.4-9.92
=19.92-9.92+15.4
=10+15.4
=25.4;
(4)5.6+2.7+4.4
=5.6+4.4+2.7
=10+2.7
=12.7;
(5)12.36-5.64-4.36
=12.36-(5.64+4.36)
=12.36-10
=2.36;
(6)35.76-6.75+2.1
=29.01+2.1
=31.11.
=65.5-42.5
=23;
(2)440.98-(87.4+161.57)
=440.98-248.97
=192.01;
(3)19.92+15.4-9.92
=19.92-9.92+15.4
=10+15.4
=25.4;
(4)5.6+2.7+4.4
=5.6+4.4+2.7
=10+2.7
=12.7;
(5)12.36-5.64-4.36
=12.36-(5.64+4.36)
=12.36-10
=2.36;
(6)35.76-6.75+2.1
=29.01+2.1
=31.11.
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