递等式计算(能简便的要简便):6.8×3.7-3.7+37×0.42,正确的计算过程是()
A.6.8×3.7-3.7+37×0.42=25.16-3.7+15.54=21.46+15.54=37
B.6.8×3.7-3.7+37×0.42=6.8×3.7-3.7×1+3.7×4.2=(6.8+1+4.2)×3.7=12×3.7=44.4
C.6.8×3.7-3.7+37×0.42=6.8×3.7-3.7×1+3.7×4.2=(6.8-1+4.2)×3.7=10×3.7=37
D.6.8×3.7-3.7+37×0.42=6.8×3.7-3.7×1+3.7×42=(6.8-1+42)×3.7=47.8×3.7=176
C、6.8×3.7-3.7+37×0.42=6.8×3.7-3.7×1+3.7×4.2=(6.8-1+4.2)×3.7=10×3.7=37