It can only be filled in the three digits of the tenth place, so the two digits of the tenth place can only be 4 and 6. Therefore, the column of vertical digits can only be 2+3=5, and the correct answer is D.【解析】观察竖式,先找到第一个突破口,和的百位只能是1, 两位数+...
4 2 6 3 1 0 5 [ Answer 】 D [ Resolution ] Observe the vertical addition: the sum of 2 two-digit numbers is a three-digit number, so the hundreds digit has to be 1. For other digits, after we try different options, we can get 5 filled in the grey square. The answer i...
【抽象代数】The fundamental theorem of finitely generated Abelian groups→有限生成阿貝爾群的基本定理 凰ちはや 00:19 这个公式这么强? 星辰魔方小李老师 87540 6:27:51 Linear Algebra, 线性代数 freeandequality 3640 07:43 赤丸白刃 07:49 A股:股市唯一100%获利法:五日均线战法,从未失手,堪称一绝!只讲一...
To find the percentage of numbers from 1 to 50 whose squares end in the digit 1, we can follow these steps:Step 1: Identify the numbers whose squares end in 1 The squares of numbers that end in the digit 1 or 9 will also end in
Nanogratings with period of 150 nm, 300 nm and 1000 nm, and nanosquares with dimensions of 150 150 nm2 were fabricated by using this direct femtosecond laser writing technique. 展开 关键词: Gratings Ultrafast lasers Laser materials processing ...
解析 (1)Solution:We know that the square of an odd number is odd and the square of an even number is even.The square of 431 is an odd number.(2)The square of 2826 is an even number.(3)The square of 7779 is an odd number.(4)The square of 82004 is an even number....
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18. The figures below are made up of identical shaded and unshaded squares.Figure 1Figure 2Figure 3Figure Number of shaded Number of Total-number of-squares unshaded squares squares12O、42536341216289(a)81(a)Fill in the missing number in the table above. [1](b)Find the total number of ...
A mathematical procedure for finding the best-fitting curve to a given set of points by minimizing the sum of the squares of the offsets ("the residuals") of the points from the curve. The sum of the squares of the offsets is used instead of the offset absolute values because this ...
To solve the problem, we need to find the smallest number that should be added to the sum of the squares of 15 and 14 so that the result is a perfect square. 1. Calculate the squares of 15 and 14: - \( 15^2 = 225 \) - \(