12+ [0.4×0.75+(7.5+△)×3] ÷0.3=98,求△=?
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12+ [0.4×0.75+(7.5+△)×3] ÷0.3=98,求△=?
12+ [0.4×0.75+(7.5+△)×3] ÷0.3=98,求△=?
12+ [0.4×0.75+(7.5+△)×3] ÷0.3=98,求△=?
12+[0.3+22.5+3Δ]÷0.3=98
12+76+10Δ=98
88+10Δ=98
10Δ=98-88
Δ=1
12+ [0.4×0.75+(7.5+△)×3] ÷0.3=98,求△=?
化简比 8:12 0.25:0.75 125:25 1.6:0.4化简比8:12 0.25:0.75 125:251.6:0.4 0.07:0.4 1.44:0.8
7.5×1.9×0.4
3.4*(12.5-7.5/0.75)简算
7.5*99.9+0.75简便运算
0.012*0.75=( )*7.5
12+(0.4*0.75+(0.5+x)*3)/0.3 求x是几对不起,是12+(0.4*0.75+(0.5+x)*3)/0.3=98,实在抱歉!
0.4*0.25/0.4*0.75 简便运算
递等式计算(能简则简)0.32+0.68*3.52.5*(0.4+0.8)*12.552*7.5-490*0.75-7.52.5*(1.6/2.5/0.04)
小数乘法推广到小数 全对给50分!3.4×7×1.5 1.25+4.6+0.75 2.33×0.5×0.4×5 1.6×7.5×1.25= =
-4.2-[(-0.2)-(-7.5+0.4)]+(-3.8)
-4.56*0.75+6.56*0.75-0.3*7.5简便计算
0.75*1.6+1.4*0.75+7.5的简算
0.75×1.6+1.4×0.75+7.5 (能简算的要简算)
0.75*1.6+1.4*0.75+7.5(简便运算)
7.5*3/4+0.75*1/2-0.75简便算
简算 2.02×8.5 1.25+4.6+0.75 1.6×7.5×1.25简算2.02×8.5 1.25+4.6+0.751.6×7.5×1.25 56×1.25 3.4×7×1.5 0.8×0.25×0.4×12.5
7.5x减5.5x等于0.75