(-5.35)*(-3)+5.35*(-7)+5.35*4 请以提取公因数的简便方法计算,请详细说明思路,
问题描述:
(-5.35)*(-3)+5.35*(-7)+5.35*4 请以提取公因数的简便方法计算,请详细说明思路,
答
(-5.35)*(-3)+5.35*(-7)+5.35*4
=5.35×3+5.35×(-7)+5.35×4
=5.35×(1-7+4)
=5.35×(-2)
=-10.7