两道递等式计算(能简则简)0.45×3.2×1.24(0.8×0.6÷1.2)÷0.2511(X-3)=5.5×424÷X+0.24=0.48

Question

两道递等式计算(能简则简)
0.45×3.2×1.24 (0.8×0.6÷1.2)÷0.25
11(X-3)=5.5×4 24÷X+0.24=0.48

Answer 1

⑴0.45×3.2×1.24=0.9×1.6×1.24=1.6×0.9×(1.25-0.01)=1.6×1.25×0.9-1.6×0.9×0.01=
1.8-0.0144=1.7856
⑵(0.8×0.6÷1.2)÷0.25=0.4×4=1.6
⑶11(X-3)=5.5×4
x-3=0.5×4
x=5
⑷24÷X+0.24=0.48（两边同时除以24）
1÷x+0.01=0.02
1÷x=0.01
x=100
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