How to calculate 1.25 * (8 + 0.8)

How to calculate 1.25 * (8 + 0.8)

1.25*（8+0.8）
=1.25*8+1.25*0.8
=10+1
=11

(- 10.8) * (- 9.25) - (- 0.75) * 10.8 be careful!

（-10.8）×[（-9.25）+（-0.75）]
=（-10.8）×（-10）
=108
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Simple calculation: 8 * 0.4 * 1.25 * 2.5

8*0.4*1.25*2.5
=（8×1.25）×（0.4×2.5）
=10×1
=10

Simple calculation of 0.25 × 1.25 × 4 × 8

0.251.25×4×8
=(0.25×4)×(1.25×8)
=1×10
=10