怎样简便就怎样计算28.4×99+28.4 3.6×2
答案:1 悬赏:20 手机版
解决时间 2021-02-14 23:29
- 提问者网友:趣果有间
- 2021-02-14 02:08
怎样简便就怎样计算28.4×99+28.4 3.6×2
最佳答案
- 五星知识达人网友:逐風
- 2021-02-14 02:38
(1)28.4×99+28.4,
=28.4×(99+1),
=2840;
(2)3.6×201,
=3.6×(200+1),
=3.6×200+3.6×1,
=720+3.6,
=723.6;
(3)0.94×2.5-0.45,
=2.35-0.45,
=1.9;
(4)4×0.8×12.5×2.5,
=(4×2.5)×(0.8×12.5),
=10×10,
=100;
(5)17.5÷0.25×17+13,
=70×17+13,
=1190+13,
=1203;
(6)12.5×32×2.5,
=(12.5×8)×(4×2.5),
=100×10,
=1000.
=28.4×(99+1),
=2840;
(2)3.6×201,
=3.6×(200+1),
=3.6×200+3.6×1,
=720+3.6,
=723.6;
(3)0.94×2.5-0.45,
=2.35-0.45,
=1.9;
(4)4×0.8×12.5×2.5,
=(4×2.5)×(0.8×12.5),
=10×10,
=100;
(5)17.5÷0.25×17+13,
=70×17+13,
=1190+13,
=1203;
(6)12.5×32×2.5,
=(12.5×8)×(4×2.5),
=100×10,
=1000.
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