Solve mentally.
a 7 x 40 – 280, so 14 x 20 –
c 9 x 80 = 720, so 18 x 40 –
b 6 x 60 – 360, so 12 x 30 –
d 8 x 6

1 thought on “Solve mentally.<br />a 7 x 40 – 280, so 14 x 20 –<br />c 9 x 80 = 720, so 18 x 40 –<br />b 6 x 60 – 360, so 12 x 30 –<br />d 8 x 6”

1. Answer:

   1. 280
   2. 720
   3. 360
   4. 480

   Step-by-step explanation:

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