4.200:(7×3)+1.450:50 =4.200:(21) + 1.450:50 =200 + 0.029 =200.029
28.907 + 12.035 - 120×5 =28.907 + 12.035 - 600 =40.942 - 600 =-559.058
9.000:100×(18+22) =0.09×40 =3.6
12.000:40×15 - 2.700 =300 × 15 - 2.700 =4.500 - 2.700 =1.800
4.200:(7×3)+1.450:50 =
4.200:(21) + 1.450:50 =
200 + 0.029 =
200.029
28.907 + 12.035 - 120×5 =
28.907 + 12.035 - 600 =
40.942 - 600 =
-559.058
9.000:100×(18+22) =
0.09×40 =
3.6
12.000:40×15 - 2.700 =
300 × 15 - 2.700 =
4.500 - 2.700 =
1.800