10×3=30(度)
10×7=70(度)
10×8=80(度)
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解:0.375:0.875的比值是( 3:7 )∵已知需求出0.375:0.875的比值是多少
A : B = A ÷ B = A / B
∴0.375 :0.875
= 0.375 ÷ 0.875
= 375/1000 ÷ 875/1000
= 3/8 ÷ 7/8
= 3/8 × 8/7
= 3/7
∴0.375 :0.875 = 3/7 = 3:7
答:0.375:0.875的比值是3:7
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