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How to do the fifth question on page 75 of the special training of mathematics class in the fourth grade of primary school (ask for help)
The number of pots on each side of the outermost layer:121÷11=1(pots)
The outermost number of pots: (11-1) × 4 = 40 (pots)1× 4-4 = 40 (pots).
Number of pots on each side of the outermost layer: (40-4)÷4=9 (pots)
The number of pots in this layer: (9- 1)×4=32 (pots)