(2.8+3.85÷3.5)×4.6
=(2.8+1.1)×4.6
=3.9×4.6
=(4-0.1)×4.6
=4×4.6-0.1×4.6
=18.4-0.46
=17.94
(7/9+3/4-11/12)×36+13÷19+18×13/19
=(7/9+3/4-11/12)×36+13/19+18×13/19
=7/9×36+3/4×36-11/12×36+13/19×(1+18)
=28+27-33+13
=35
(2.8+3.85÷3.5)×4.6
=(2.8+1.1)×4.6
=3.9×4.6
=(4-0.1)×4.6
=4×4.6-0.1×4.6
=18.4-0.46
=17.94
(7/9+3/4-11/12)×36+13÷19+18×13/19
=(7/9+3/4-11/12)×36+13/19+18×13/19
=7/9×36+3/4×36-11/12×36+13/19×(1+18)
=28+27-33+13
=35