1800÷12.5÷2.5÷3.2
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解:1800÷12.5÷2.5÷3.2等于( 18 )
∵已知需求出1800÷12.5÷2.5÷3.2等于多少
∴1800 ÷ 12.5 ÷ 2.5 ÷ 3.2
= 1800 ÷ (12×10+5)/10 ÷ (2×10+5)/10 ÷ (3×10+2)/10
= 1800 ÷ 125/10 ÷ 25/10 ÷ 32/10
= 1800 ÷ 25/2 ÷ 5/2 ÷ 16/5
= 1800 × 2/25 × 2/5 × 5/16
= 144 × (2/5 × 5/16)
= 144 × 1/8
= 18
答:1800÷12.5÷2.5÷3.2等于18
∵已知需求出1800÷12.5÷2.5÷3.2等于多少
∴1800 ÷ 12.5 ÷ 2.5 ÷ 3.2
= 1800 ÷ (12×10+5)/10 ÷ (2×10+5)/10 ÷ (3×10+2)/10
= 1800 ÷ 125/10 ÷ 25/10 ÷ 32/10
= 1800 ÷ 25/2 ÷ 5/2 ÷ 16/5
= 1800 × 2/25 × 2/5 × 5/16
= 144 × (2/5 × 5/16)
= 144 × 1/8
= 18
答:1800÷12.5÷2.5÷3.2等于18
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