四年级数学上册『运算律』简便运算计算题

四年级数学上册『运算律』简便运算计算题


简介:
1.50﹣12.48﹣7.52 =50﹣(12.48+7.52) =50﹣20 =30 2.9.42+35.7+4.3+8.58 =(9.42+8.58)+(35.7+4.3) =18+40 =58 3.7000÷25÷4 =7000÷(25×4) =7000÷100 =70 4.63×199+63 =63×(199+1) =63×200 =12600 5.5×125×6×8 =(5×6)×(125×8) =30×1000 =30000