a) >; <; =?

6,3 × 3,7 ..... 3,7 ×6,3

(4,6 × 3,5) × 2 ..... 4,6 × (3,5 × 2)

1,5 × 5,6 × 4 ..... 1,5 × 4 × 5,6

b) Tính bằng cách thuận tiện

(6,7 × 4) × 2,5 = ...................................                         = ...................................                         = ...................................

0,125 × 4,3 × 8 = ..................................                          = ..................................                          = ..................................

a) 8,4 × 5

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b) 0,67 × 60

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c) 7,5 × 48

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d) 5,26 × 73

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a)

$\begin{array}{l}\times \begin{array}{c}9,3\\ \underset{¯}{27}\end{array}\\ 651\\ \underset{¯}{186}\\ 837\end{array}$

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b)

$\begin{array}{l}\times \begin{array}{c}0,72\\ \underset{¯}{56}\end{array}\\ 432\\ \underset{¯}{360}\\ 4032\end{array}$

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