3.45×1.2-2点二五怎么简便运算?
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2022-09-23
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3.45×1.2-2点二五怎么简便运算?
3.45×1.2-2.25
=5x(0.69x1.2-0.45)
=5x(0.69+0.69x0.2-0.45)
=5x(0.24+0.69x0.2)
=5x0.2x(1.2+0.69)
=1.89
3.45×1.2-2.25
=5x(0.69x1.2-0.45)
=5x(0.69+0.69x0.2-0.45)
=5x(0.24+0.69x0.2)
=5x0.2x(1.2+0.69)
=1.89
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3.45×1.2-2.25
3.45×1.2=4.14
=
2.25÷1.2=1.875
3.45×1.2-2.25
=4.14-2.25
=1.89
3.45×1.2=4.14
=
2.25÷1.2=1.875
3.45×1.2-2.25
=4.14-2.25
=1.89
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3.45*1.2-2.25
=6.9*0.6-2.25
=7*0.6-0.1*0.6-2.25
=4.2-0.06-2.25
=2-0.06-0.05
=2-0.11
=1.89
=6.9*0.6-2.25
=7*0.6-0.1*0.6-2.25
=4.2-0.06-2.25
=2-0.06-0.05
=2-0.11
=1.89
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