专项提升卷1 乘除法及混合运算
专项提升卷1 乘除法及混合运算提升点1:判断积、商的位数)1.12×3的积是( )位数。17×6的积是( )位数。203×4的积是( )位数。429×2的积是( )位数。49÷5的商是( )位数。308÷6的商是( )位数。226÷2的商是( )位数。519÷3的商是( )位数。提升点2:计算中的易错题)(一)整十数、几百几十数除以一位数的口算2.口算120÷4时,想:把( )个十平均分成( )份,每份是( )个十,也就是( )。(二)乘除法的估算3.因为21接近20,所以21×8的结果接近20×8,21×8就约等于()。4.396×4≈ ...
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