3.6*31.4+43.9*6.4简便运算

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3.6*31.4+43.9*6.4简便运算3.6*31.4+43.9*6.4简便运算3.6*31.4+43.9*6.4简便运算3.6×31.4+43.9×6.4=3.6×31.4+43.9×(10-.

3.6*31.4+43.9*6.4简便运算
3.6*31.4+43.9*6.4简便运算

3.6*31.4+43.9*6.4简便运算
3.6×31.4+43.9×6.4
=3.6×31.4+43.9×(10-.3.6)
=43.9×10-43.9×3.6+31.4×3.6
=439-3.6×(43.9-31.4)
=439-3.6×12.5
=439-45
=394

3.6*31.4+43.9*6.4
=31.4*(10-6.4)+43.9*6.4
=31.4*10+(43.9-31.4)*6.4
=314+12.5*6.4
=394