1.4275+240÷16×5
=4275+240÷4÷4×5
=4275+60÷4×5
=4275+15×5
=4275+75=4350
2.(2.5+0.125)×8-3.6
=2.5×8+0.125×8-3.6
=20+1-3.6=17.4
3.2/5×5/6÷(3/5+1/6)
=2/6÷23/30
=1/3×30/23=10/23
4.8/9×[3/4-(11/12-5/6)]
=8/9×3/4-8/9×(11/12-5/6)
=2/3-2/27==16/27
1.4275+240÷16×5
=4275+240÷4÷4×5
=4275+60÷4×5
=4275+15×5
=4275+75=4350
2.(2.5+0.125)×8-3.6
=2.5×8+0.125×8-3.6
=20+1-3.6=17.4
3.2/5×5/6÷(3/5+1/6)
=2/6÷23/30
=1/3×30/23=10/23
4.8/9×[3/4-(11/12-5/6)]
=8/9×3/4-8/9×(11/12-5/6)
=2/3-2/27==16/27