(1.3+3.4+0.72)×(3.4+0.72+6.51)-(1.4+3.4+0.72+6.51)×(3.4+0.72)
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(1.3+3.4+0.72)×(3.4+0.72+6.51)-(1.4+3.4+0.72+6.51)×(3.4+0.72)(1.3+3.4+0.72)×(3.4+0.72+6.51)-(1.4+3.4
(1.3+3.4+0.72)×(3.4+0.72+6.51)-(1.4+3.4+0.72+6.51)×(3.4+0.72)
(1.3+3.4+0.72)×(3.4+0.72+6.51)-(1.4+3.4+0.72+6.51)×(3.4+0.72)
(1.3+3.4+0.72)×(3.4+0.72+6.51)-(1.4+3.4+0.72+6.51)×(3.4+0.72)
(1.3+3.4+0.72)×(3.4+0.72+6.51)-(1.4+3.4+0.72+6.51)×(3.4+0.72)
=(4.12+1.3)×(4.12+6.51)-(4.12+7.91)×4.12
=4.12×4.12+1.3×4.12+4.12×6.51+1.3×6.51-4.12×4.12-7.91×4.12
=1.3×4.12+1.3×6.51-(7.91-6.51)×4.12
=1.3×4.12+1.3×6.51-1.4×4.12
=1.3×6.51-0.1×4.12
=8.463-0.412
=8.051
8.051
2856
不告诉你!
你打完这些的时候早就算出来了!
什么人。
(1.3+3.4+0.72)×(3.4+0.72+6.51)-(1.4+3.4+0.72+6.51)×(3.4+0.72)
(x一1.7)÷3=1.8 7x-3.4x=0.72 o.5x+7 X 0.5=7解方程
3.4×99+3.4 187.7*11-187.7 简便运算
3.4两题具体步骤,+结果
5×+7.4=31.80.7×+3.4×=37.72(×-12)÷4=4.55×(×+2.4)=25.53.2×+1.8×=3.5
有理数的加法运算律(要过程)谢谢!(1)-77+43+(+27) (2)(-0.5)+(+3 右1/4)+(+2.75)+(-5右1/2) (4)(+7.6)+(-18)+(+3.4)+(-12)
③(-2.6)+(+3.4)+(+2.6)+(-4.4)④1+(-2)+3+(-4)+5+(-6)+...+(99)+(-100)不要直接写得数,过程要一步一步的,就是拖式的.30分,谁写的好就送给谁.
1、65×3.4+6.5×66 2、720÷45 计算以上题目(简便计算)!
7y-3.4y=0.72
x+3.4x=28.6 用方程解
359+161和3.4÷0.2.算出来,并验算
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