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amselah735
amselah735
30.03.2021 • 
Mathematics

Select all of the following expressions that are true. Explain. 87 × 910 = 7270; I multiplied 8 and 9 to get the numerator, and I multiplied 7 and 10 to get the denominator. 710 × 98 = 1618; I added 7 and 9 to get the numerator, and I added 10 and 8 to get the denominator. 107 × 98 = 9015; I multiplied 10 and 9 to get the numerator, and I added 7 and 8 to get the denominator. 79 × 810 = 5690; I multiplied 7 and 8 to get the numerator, and I multiplied 9 and 10 to get the denominator. 810 × 910 = 7220; I multiplied 8 and 9 to get the numerator, and I added 10 and 10 to get the denominator.

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