Question

请简便计算:1.25X0.25X8.4怎么算?速求答案谢谢

请好心人帮忙一下，急急急?????

Answer 1

1.25 × 0.25 × 8.4
= 1.25 × 0.25 × (8 + 0.4)
= 1.25 × 0.25 × 8 + 1.25 × 0.25 × 0.4
= 10 × 0.25 + 1.25 × 0.1
= 2.5 + 0.125
= 2.625

Answer 2

原式
=1.25×0.25×4×2.1
=1.25×2.1×（0.25×4）
=1.25×2.1
=1.25×（2+0.1）
=1.25×2+1.25×0.1
=2.625

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Answer 3

1.25X0.25X8.4
=1.25X0.25X(0.4+8)
=1.25X(0.25X0.4)+1.25x8x0.25
=0.125+2.5
=2.625

Answer 4

1.25X0.25X8.4
=1.25×0.25×4×2.1
=1.25×1×2.1
=2.625；