A-A+
用你喜欢的方法计算. 136×21352001×3.14+200.1×31.4+20.01×
问题详情
用你喜欢的方法计算.
参考答案
(1)136×2135
=(135+1)×2135,
=135×2135+1×2135,
=2+2135,
=22135;
(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)58-[(12+35)×511]
=58-[1110×511],
=58-12,
=18;
(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)118÷(14+2.5×45)
=118÷(14+2),
=98÷94,
=12.
考点:方法