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A. Multiplying by 572 is derived Multiplying by 143. Since 572 = 1001 x (4/7) you can divide by 7, multiply by 4, and then multiply by 1001.
Ex [1] 63 x 572 =_________.
a) 63 ÷ 7 = 9.
b) 9 x 4 = 36.
c) 36 x 1001 = 36036.
d) The answer is 36036.
Ex [2] 721 x 572 =_________.
a) 721 ÷ 7 = 103.
b) 103 x 4 = 412,
c) 412 x 1001 = 412412.
d) The answer is 412412.