六年级下册数学小升初必考简便运算易错题
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简介
7.6×99 =7.6×(100-1) =7,6×100-7.6 =760-7.6 =752.4 20× ÷ × =（20÷）×（ × ） =16× =1 ÷[（ - ）÷] =÷[ ÷] =÷ =×5 =4 7.52÷2.5÷4 =7.52÷（2.5×4） =7.52÷10 =0.752 （+）×15- =×15+×15- =1+ - =1+（ - ） =1 ×[1÷（ - ）] = ×[1÷ ] = × =
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