3.14-0.24乘1.2
=3.14-0.288
=2.852
(3.8+4.72+1.56)÷(1.9+2.36+0.78)
=(2x1.9+2x2.36+2x0.78)÷(1.9+2.36+0.78)
=2x(1.9+2.36+0.78)÷(1.9+2.36+0.78)
=2
3.14-0.24乘1.2
=3.14-0.288
=2.852
(3.8+4.72+1.56)÷(1.9+2.36+0.78)
=(2x1.9+2x2.36+2x0.78)÷(1.9+2.36+0.78)
=2x(1.9+2.36+0.78)÷(1.9+2.36+0.78)
=2