Question

脱式计算：7.9×1又1/4+4.1÷4/5 5/8×（2/5+1/3）÷2/3 （1/5+4/5×1/8）÷1/5

能简便的要简便计算

Answer 1

7.9×1又1/4+4.1÷4/5
=7.9×1又1/4+4.1×5/4
=5/4×(7.9+4.1)
=5/4×12
=15

5/8×（2/5+1/3）÷2/3
=5/8×2/5×3/2+5/8×1/3×3/2
=3/8+5/16
=11/16

（1/5+4/5×1/8）÷1/5
=1/5×5+4/5×18×5
=1+72
=73