①43×7/44②7/18×19-7/18③10÷2/5-3/4×2/9 (求简便算式)

问题描述:

①43×7/44②7/18×19-7/18③10÷2/5-3/4×2/9 (求简便算式)


43×7/44
= 301/44

7/18×19-7/18
=7×(19-1)/18
=7×18/18
=7

10÷2/5-3/4×2/9
=5/5 - 1/2×1/3
=1 - 1/6
=5/6

1﹚43×7/44
=44×7/44-7/44
=7-7/44
=6又37/44
2﹚7/18×19-7/18
=7/18×﹙19-1﹚
=7/18×18
=7
3﹚10÷2/5-3/4×2/9
=100÷4-1/6
=25-1/6
=24又5/6