怎样简便就怎样计算28.4×101-28.4 3.6×201 &nbs...
答案:2 悬赏:70 手机版
解决时间 2021-01-17 07:26
- 提问者网友:做自己de王妃
- 2021-01-16 14:12
怎样简便就怎样计算28.4×101-28.4 3.6×201 &nbs...
最佳答案
- 五星知识达人网友:等灯
- 2021-01-16 14:49
①28.4×101-28.4
=28.2×(100+1)
=28.2×100+28.2×1
=2820+28.2
=2848.2;
②3.6×201
=3.6×(200+1)
=3.6×200+3.6×1
=720+3.6
=723.6;
③3.5×0.7+5.5×0.7+0.7
=(3.5+5.5+1)×0.7
=10×0.7
=7;
④4×0.8×12.5×2.5
=(0.8×12.5)×(4×2.5)
=10×10
=100;
⑤17.5÷0.25×17+13
=70×17+13
=1190+13
=1203;
⑥0.94×2.5-0.45
=2.35-0.45
=1.9.
=28.2×(100+1)
=28.2×100+28.2×1
=2820+28.2
=2848.2;
②3.6×201
=3.6×(200+1)
=3.6×200+3.6×1
=720+3.6
=723.6;
③3.5×0.7+5.5×0.7+0.7
=(3.5+5.5+1)×0.7
=10×0.7
=7;
④4×0.8×12.5×2.5
=(0.8×12.5)×(4×2.5)
=10×10
=100;
⑤17.5÷0.25×17+13
=70×17+13
=1190+13
=1203;
⑥0.94×2.5-0.45
=2.35-0.45
=1.9.
全部回答
- 1楼网友:酒者煙囻
- 2021-01-16 15:21
0.9*2.5 减0.45
我要举报
如以上问答信息为低俗、色情、不良、暴力、侵权、涉及违法等信息,可以点下面链接进行举报!
大家都在看
推荐资讯