问题
解答题
下面各题,怎样计算简便就怎样计算. 2002-540÷36×96 7.28-(1.28+0.25) 2.25×1.8+17.5×0.18 36×(
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答案
(1)2002-540÷36×96
=2002-540÷9÷4×96,
=2002-60÷4×96,
=2002-15×6×16,
=2002-90×16,
=2002-1440,
=562;
(2)7.28-(1.28+0.25)
=7.28-1.28-0.25,
=6-0.25,
=5.75;
(3)2.25×1.8+17.5×0.18
=2.25×1.8+1.75×1.8,
=(2.25+1.75)×1.8,
=4×1.8,
=7.2;
(4)36×(
+2 9
-7 12
)1 4
=36×
+36×2 9
-36×7 12
,1 4
=8+21-9,
=20;
(5)
÷[1-(7 15
-4 5
)].2 3
=
÷[1-(7 15
-12 15
)],10 15
=
÷[1-7 15
],2 15
=
×7 15
,15 13
=
.7 13