5.6×0.7 5.6×0.4减0.5的简便运算

2025-06-28 11:40:02
推荐回答(2个)
回答1:

5.6×0.7+ 5.6×0.4-0.5
=5.6*(0.7+0.4)-0.5
=5.6*1.1-0.5
=5.6*1+5.6*0.1-0.5
=5.6+0.56-0.5
=5.66

回答2:

5.6X0.7+5.6X0.4-0.5
=5.6X(0.7+0.4)-0.56+0.06
=5.6X(1.1-0.1)+0.06
=5.6+0.06
=5.66