下面各题怎样计算简便就怎样算. (1)25×44+75×56;  ...
下面各题怎样计算简便就怎样算.(1)25×44+75×56;(2)15.6+18.2-15.6+18.2;(3)13.94-8.37-1.63;(4)78×l25×8;(...
下面各题怎样计算简便就怎样算. (1)25×44+75×56; (2)15.6+18.2-15.6+18.2;(3)13.94-8.37-1.63; (4)78×l25×8;(5)225÷15×(265-250);(6)(56-224÷14)×l2.
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(1)25×44+75×56
=1100+4200
=5300;
(2)15.6+18.2-15.6+18.2
=(15.6-15.6)+(18.2+18.2)
=0+36.4
=36.4;
(3)13.94-8.37-1.63
=13.94-(8.37+1.63)
=13.94-10
=3.94;
(4)78×l25×8
=78×(l25×8)
=78×1000
=78000;
(5)225÷15×(265-250)
=225÷15×15
=15×15
=225;
(6)(56-224÷14)×l2
=(56-16)×l2
=40×12
=480.
=1100+4200
=5300;
(2)15.6+18.2-15.6+18.2
=(15.6-15.6)+(18.2+18.2)
=0+36.4
=36.4;
(3)13.94-8.37-1.63
=13.94-(8.37+1.63)
=13.94-10
=3.94;
(4)78×l25×8
=78×(l25×8)
=78×1000
=78000;
(5)225÷15×(265-250)
=225÷15×15
=15×15
=225;
(6)(56-224÷14)×l2
=(56-16)×l2
=40×12
=480.
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