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32.5×2.9 3.45脱式计算.

32.5×0.99+0.35 =32.5x1 -32.5x0.01+0.35 =32.5 -0.325+0.35 =32.5 +0.025 =32.525

一首歌是个居委会

0.25×32×12.5 =0.25×(4×8)×12.5 =(0.25×4)×(8×12.5) =1×100 =100

(1)32.5+1.07+17.5+0.93=(32.5+17.5)+(1.07+0.93)=50+2=52;(2)32×125×25=4×8×125×25=(8×125)×(25×4)=1000×100=100000;(3)1119-219-419=919-419=519.

32.5-4.82+1.7-8.92 =27.68+1.7-8.92 =29.38-8.92 =20.46

53.9+50.6-32.4 =3.3-32.4 =-29.1 9.05×28+9.05×72 =9.05×(28+72) =9.05×100 =905

请把题目写清楚

括号3/8+5分之二括号乘以32脱式计算 (3/8+2/5)*32 =3/8*32+2/5*32 =12+12.8 =24.8

325 解析: 32.5×3.5+325×0.65 =32.5×3.5+32.5×6.5 =32.5×(3.5+6.5) =32.5×10 =325

62除以4乘2 =15点5乘2 =31

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