Question

Which property justifies each picture?

1) 3/7• 7/3 = 1
2)68 + 21 = 89
3)-69 + 69 =0
4) 169 + 0 = 169
5) (20 199) • 1 = 20 199
6) 64(100 +25) = 64 (125)
7) 73 • (10-1) =730 -73
8) 836 + 286 +64 = 836 + 64 + 286
9) 2020 + [2018 + (-2018)] =2020 + 0
10) (24 - 85) + (63 + 17) = [(24 - 85) + 63] + 17
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Answer 1

Answer:

69×78+22×69

=69×(70+8)+22×(60+9) (Distributive property)

=69×70+69×8+22×60+22×9

=4830+552+1320+198

=6900.

Step-by-step explanation:

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