(81.4-3.75)➗2.5➗4
2个回答
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解:(81.4-3.75)÷2.5÷4等于( 1553/200 ),【即等于7.765】
∵已知需求出(81.4-3.75)÷2.5÷4等于多少
∴(81.4 - 3.75) ÷ 2.5 ÷ 4
= [(81×10+4)/10 - (3×100+75)/100] ÷ (2×10+5)/10 ÷ 4
= (814/10 - 375/100) ÷ 25/10 ÷ 4
= (407/5 - 15/4)÷ 5/2 ÷ 4
= (1628/20 - 75/20)× 2/5 × 1/4
= 1553/20 × 2/5 × 1/4
= 1553/50 × 1/4
= 1553/200
= 7.765
答:(81.4-3.75)÷2.5÷4等于1553/200,【即等于7.765】
∵已知需求出(81.4-3.75)÷2.5÷4等于多少
∴(81.4 - 3.75) ÷ 2.5 ÷ 4
= [(81×10+4)/10 - (3×100+75)/100] ÷ (2×10+5)/10 ÷ 4
= (814/10 - 375/100) ÷ 25/10 ÷ 4
= (407/5 - 15/4)÷ 5/2 ÷ 4
= (1628/20 - 75/20)× 2/5 × 1/4
= 1553/20 × 2/5 × 1/4
= 1553/50 × 1/4
= 1553/200
= 7.765
答:(81.4-3.75)÷2.5÷4等于1553/200,【即等于7.765】
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