2.5×4.4*0.7的简便运算

Question

如题所述

Answer 1

2.5×4.4×0.7
＝（2.5×0.4）×（11×0.7）
＝1×7.7
＝7.7
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Answer 2

2.5×4.4*0.7的简便运算
解：根据拆分法和结合律的运用，
原式=2.5x4x1.1x0.7
=10x1.1x0.7
=11x0.7
=7.7

Answer 3

=2.5×（4+0.4）×0.7
=（2.5×4+2.5×0.4）×0.7
=（10+1）×0.7
=11×0.7
=7.7

Answer 4

解:
原式=2.5X4X1.1X0.7
=10X1.1X0.7
=11X0.7
=7.7

Answer 5

2.5X4X1.1X0.7
=10X1.1X0.7
=11X0.7
=7.7