255 × 8 + 386 × 5 =? % of 7940
255 × 8 + 386 × 5 = ? % of 7940 => 2040 + 1930 = ? % of 7940 => 3970 = ? % of 7940 => ? = 50
Solve : (3.2 × 104) ÷ (2 × 105)
`2/5` ___ 15 ___ 115___ 20 ___ 4 = 581
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