简便计算.5.28+7.3+4.72 3.68+7.56-2.68 10.32-5.8-4.2.
(1)5.28+7.3+4.72
=(5.28+4.72)+7.3
=10+7.3
=17.3;
(2)3.68+7.56-2.68
=(3.68-2.68)+7.56
=1+7.56
=8.56;
(3)10.32-5.8-4.2
=10.32-(5.8+4.2)
=10.32-10
=0.32.
=(5.28+4.72)+7.3
=10+7.3
=17.3;
(2)3.68+7.56-2.68
=(3.68-2.68)+7.56
=1+7.56
=8.56;
(3)10.32-5.8-4.2
=10.32-(5.8+4.2)
=10.32-10
=0.32.
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