This is how I approximate the product: 32 * 8 = 30*8 + 2*8 = 10(3*8) + 16 = 10(24) + 16 = 240 + 16 = 256.
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8 x 32 = 256
8*4=32 8+8+8+8=32
4 is 8 times smaller than 32. You can find this simply by dividing 32 by 4, which would give you 8. You can also check your answer by multiplying 4 and 8 to make sure it results in 32, because 32 it 8 times greater than 4 (and 4 times greater than 8).
32
Lets work it out..... 8 times 4 is 32...... 8 times 9 is 72 -> so 8 times 90 is 720, and then add the 32... and we get 752