3.33*1.6+6.66*4.2怎么简便运算
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3.33*1.6+6.66*4.2怎么简便运算
![3.33*1.6+6.66*4.2怎么简便运算](/uploads/image/z/5368962-66-2.jpg?t=3.33%2A1.6%2B6.66%2A4.2%E6%80%8E%E4%B9%88%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97)
3.33*1.6+6.66*4.2
=3.33×2×0.8+6.66×4.2
=6.66×0.8+6.66×4.2
=6.66×(0.8+4.2)
=6.66×5
=3.33×(2×5)
=33.3
再问: 8.8*43.2-33.2*5.9-33.2*2.9
再答: 8.8*43.2-33.2*5.9-33.2*2.9=8.8*43.2-33.2*(5.9+2.9)=8.8*43.2-33.2*58.8=8.8×(43.2-33.2)=8.8×10=88
=3.33×2×0.8+6.66×4.2
=6.66×0.8+6.66×4.2
=6.66×(0.8+4.2)
=6.66×5
=3.33×(2×5)
=33.3
再问: 8.8*43.2-33.2*5.9-33.2*2.9
再答: 8.8*43.2-33.2*5.9-33.2*2.9=8.8*43.2-33.2*(5.9+2.9)=8.8*43.2-33.2*58.8=8.8×(43.2-33.2)=8.8×10=88