4.56×0.27+483×0.0456+1.9×4.56+0.456×30=________．

45.6
分析：先把各個(gè)乘法算式變成都含有因數(shù)4.56，再運(yùn)用乘法分配律簡(jiǎn)算．
解答：4.56×0.27+483×0.0456+1.9×4.56+0.456×30，
=4.56×0.27+4.83×4.56+1.9×0.456+4.56×3，
=4.56×（0.27+4.83+1.9+3），
=4.56×10，
=45.6；
故答案為：45.6．
點(diǎn)評(píng)：簡(jiǎn)算時(shí)看到此類“幾個(gè)乘法相加減”的題，先觀察這幾個(gè)乘法有沒(méi)有相同因數(shù)，或者能不能轉(zhuǎn)化出相同因數(shù)．
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科目：小學(xué)數(shù)學(xué) 來(lái)源： 題型：

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科目：小學(xué)數(shù)學(xué) 來(lái)源： 題型：

口算
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（3）
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（4）3.14×3=
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（5）3.99+5.2=
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（6）22×0.2=
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3
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（7）0.8×0.8=
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52
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18
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（9）1.5×4=
6
6
   20×16=
320
320
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84
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0.8
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（10）0.28×100=
28
28
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3.2
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50
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科目：小學(xué)數(shù)學(xué) 來(lái)源： 題型：閱讀理解

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科目：小學(xué)數(shù)學(xué) 來(lái)源： 題型：解答題

我會(huì)巧算．
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科目：小學(xué)數(shù)學(xué) 來(lái)源： 題型：解答題

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