쉬운 방법으로 계산하다. 1.6.27×3.6+37.8×0.36 2.369×0.99+3.69 3.(0.64+0.32) Δ0.64 4.13.5×2.5-0.35×25 5.0.76 Δ0.4-0.38 6.12.8+0.79 Δ0.9

쉬운 방법으로 계산하다. 1.6.27×3.6+37.8×0.36 2.369×0.99+3.69 3.(0.64+0.32) Δ0.64 4.13.5×2.5-0.35×25 5.0.76 Δ0.4-0.38 6.12.8+0.79 Δ0.9

1. 6.27×3.6+37.8×0.36=6.27×3.6+3.78×3.6=(6.27+3.78)×3.6=10×3.6=362.369×0.99+3.69=3.69×99+3.69=3.69×(99+1)=3.69×100=3693.(0.64+0.32) Δ0.64=(0.32×2+0.32) Δ0.64=(2+1)×0.32.