2.9*3.3+3.3*0.5的简便方法?
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解:2.9*3.3+3.3*0.5等于( 561/50 ),【即等于11.22】
∵已知需求出2.9*3.3+3.3*0.5等于多少
X × Y + X × Z = X × (Y + Z)
∴2.9 * 3.3 + 3.3 * 0.5
= 3.3 × (2.9 + 0.5)
= (3×10+3)/10 × [(2×10+9)/10 + 5/10]
= 33/10 × (29/10 + 1/2)
= 33/10 × (29/10 + 5/10)
= 33/10 × 34/10
= 33/10 × 17/5
= 561/50
= 11.22
答:2.9*3.3+3.3*0.5等于561/50,【即等于11.22】
∵已知需求出2.9*3.3+3.3*0.5等于多少
X × Y + X × Z = X × (Y + Z)
∴2.9 * 3.3 + 3.3 * 0.5
= 3.3 × (2.9 + 0.5)
= (3×10+3)/10 × [(2×10+9)/10 + 5/10]
= 33/10 × (29/10 + 1/2)
= 33/10 × (29/10 + 5/10)
= 33/10 × 34/10
= 33/10 × 17/5
= 561/50
= 11.22
答:2.9*3.3+3.3*0.5等于561/50,【即等于11.22】
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2.9*3.3+0.5*3.3
=(2.9+0.5)*3.3
=3.4*3.3
=(3+0.4)*3.3
=3*3.3+0.4*3.3
=9.9+1.32
=9.9+0.1+1.22
=11.22
=(2.9+0.5)*3.3
=3.4*3.3
=(3+0.4)*3.3
=3*3.3+0.4*3.3
=9.9+1.32
=9.9+0.1+1.22
=11.22
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