8×4×2+6.5×4×2+8×6.5

问题描述:

8×4×2+6.5×4×2+8×6.5

8×4×2+6.5×4×2+8×6.5
=8×8+6.5×8+8×6.5
=8×(8+6.5+6.5)
=8×21
=168