1, observe the deconstruction diagram carefully (just justify yourself)

For example, 1 floor 1 block, 2 1+3=4 blocks, 3 1+3+5=9 blocks, and 4/9+7= 16 blocks. . . They are all typical squares-the square of n100 =100 *100 =10000.

2. Find the law 3 = 2+1;

5=3+2;

? 9=5+4;

17=9+8;

? . . . . See the back 2,1; ? 3、2; Five and four are consecutive numbers. . The first formula 3 in front is the first number of the second formula, and the 5 on the left of the second formula is the first number on the right of the third formula.

So the fifth formula:? = 17+ 16=33;

Type 6:? =33+32=65;

3, all square hemp!

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