问题
解答题
用你喜欢的方法计算.
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答案
(1)136×2 135
=(135+1)×
,2 135
=135×
+1×2 135
,2 135
=2+
,2 135
=2
;2 135
(2)2001×3.14+200.1×31.4+20.01×314
=2001×3.14+2001×3.14+2001×3.14,
=2001×3.14×3,
=(2000+1)×9.42,
=2000×9.42+1×9.42,
=18840+9.42,
=18849.42;
(3)
-[(5 8
+1 2
)×3 5
]5 11
=
-[5 8
×11 10
],5 11
=
-5 8
,1 2
=
;1 8
(4)333×334+999×222
=333×334+333×(3×222),
=333×334+333×666,
=333×(334+666),
=333×1000,
=333000.
(5)1.25×17.6+36.1÷0.8+2.63×12.5
=1.25×17.6+36.1×1.25+26.3×1.25,
=(17.6+36.1+26.3)×1.25,
=80×1.25,
=100;
(6)1
÷(1 8
+2.5×1 4
)4 5
=1
÷(1 8
+2),1 4
=
÷9 8
,9 4
=
.1 2