(1)8.54÷2.5÷0.4
=8.54÷(2.5×0.4)
=8.54÷1
=8.54;
(2)(9.37+9.37+9.37+9.37)×2.5
=9.37×4×2.5
=9.37×(4×2.5)
=9.37×10
=93.7;
(3)3.6×10.1-0.36
=3.6×10.1-3.6×0.1
=3.6×(10.1-0.1)
=3.6×10
=36;
(4)2.22×9.9+6.66×6.7
=2.22×3×3.3+6.66×6.7
=6.66×3.3+6.66×6.7
=6.66×(3.3+6.7)
=6.66×10
=66.6.