计算下面各题能简算的要简算 1.3⼀4×3⼀5+2⼀5×3⼀4= = = = 2.8×5⼀6+2⼀

计算下面各题能简算的要简算 1.3/4×3/5+2/5×3/4= = = = 2.8×5/6+2/5÷4= = = =
2025-02-28 14:57:34
推荐回答(2个)
回答1:

1.3/4×3/5+2/5×3/4
=1/4x 1/5 x3(1.3+2)
=3/20 x3.3
=9.9/20
=99/200

2.8×5/6+2/5÷4
=14/5 x 5/6 +2/5 x 1/4
=2/5 (7 x 5/6 + 1/4)
=2/5(70/12 + 3/12)
=2/5 x 73/12
=73/30

回答2: