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北师大版小学数学第四册第二单元混合运算

北师大版小学数学第四册第二单元混合运算. 小 熊 购 物. 横山县武镇中心小学 高万艳. 6+3×4 =12+6 =18( 元 ). 6+3×4 =6+12 =18( 元 ). 6+3×4 =9×4 =36( 元 ). (√). (×). (√). 一个算式里有加法又有乘法要 先算乘法，再算加法. 乐乐有 20 元，买 3 包饼干要找回多少钱？. 20-3×4. =20-12. =8( 元 ). 答：买 3 包饼干要找回 8 元钱。. 4×5+3. 3+4×5. =20+3. =3+20 =23( 瓶 ).

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北师大版小学数学第四册第二单元混合运算

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  1. 北师大版小学数学第四册第二单元混合运算 小 熊 购 物 横山县武镇中心小学 高万艳

  2. 6+3×4 =12+6 =18(元) 6+3×4 =6+12 =18(元) 6+3×4 =9×4 =36(元) (√) (×) (√)

  3. 一个算式里有加法又有乘法要 先算乘法，再算加法.

  4. 乐乐有20元，买3包饼干要找回多少钱？ 20-3×4 =20-12 =8(元) 答：买3包饼干要找回8元钱。

  5. 4×5+3 3+4×5 =20+3 =3+20 =23(瓶) =23(瓶) 答：一共有23瓶

  6. 7×3+5 50-4×5 7+6×2 =50-20 =7+12 =21+5 =26 =30 =19

  7. 7×3+5 50-4×5 7+6×2

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