计算下面各题,怎样简便就怎样算.(125+7)×8 3.27+6.4+2.73+4.6 &nb...
计算下面各题,怎样简便就怎样算.(125+7)×83.27+6.4+2.73+4.6124×5+169÷1325×446.45-0.58-1.4212×(324-285)...
计算下面各题,怎样简便就怎样算.(125+7)×8 3.27+6.4+2.73+4.6 124×5+169÷13 25×44 6.45-0.58-1.42 12×(324-285)÷26.
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(1)(125+7)×8,
=125×8+7×8,
=1000+56,
=1056;
(2)3.27+6.4+2.73+4.6,
=(3.27+2.73)+(6.4+4.6),
=6+11,
=17;
(3)124×5+169÷13,
=620+13,
=633;
(4)25×44,
=25×4×11,
=100×11,
=1100;
(5)6.45-0.58-1.42,
=6.45-(0.58+1.42),
=6.45-2,
=4.45;
(6)12×(324-285)÷26,
=12×39÷26,
=468÷26,
=18.
=125×8+7×8,
=1000+56,
=1056;
(2)3.27+6.4+2.73+4.6,
=(3.27+2.73)+(6.4+4.6),
=6+11,
=17;
(3)124×5+169÷13,
=620+13,
=633;
(4)25×44,
=25×4×11,
=100×11,
=1100;
(5)6.45-0.58-1.42,
=6.45-(0.58+1.42),
=6.45-2,
=4.45;
(6)12×(324-285)÷26,
=12×39÷26,
=468÷26,
=18.
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