问题
解答题
简算下面各题.
|
答案
(1)9.8×102,
=9.8×(100+2),
=9.8×100+9.8×2,
=980+19.6,
=999.6;
(2)32×12.5×2.5,
=8×4×12.5×2.5,
=(8×12.5)×(4×2.5),
=100×10,
=1000;
(3)4.13×101-4.13,
=4.13×(101-1),
=4.13×100,
=413.
简算下面各题.
|
(1)9.8×102,
=9.8×(100+2),
=9.8×100+9.8×2,
=980+19.6,
=999.6;
(2)32×12.5×2.5,
=8×4×12.5×2.5,
=(8×12.5)×(4×2.5),
=100×10,
=1000;
(3)4.13×101-4.13,
=4.13×(101-1),
=4.13×100,
=413.
阅读下列材料:
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图1《拿破仑加冕》 | ![]() |
图2《 * * 宣言》 | ![]() |
图3《路易十六上断头台》 |
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图4《攻占巴士底狱》 | ![]() |
图5《罗伯斯庇尔》 |
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