下面各题怎样简便就怎样算. ①125×32×25 ②32.62-2.25-3.75 ③146×34+34×54 ④85
下面各题怎样简便就怎样算.①125×32×25②32.62-2.25-3.75③146×34+34×54④85×102⑤6000÷125÷8⑥672-36+64....
下面各题怎样简便就怎样算. ①125×32×25 ②32.62-2.25-3.75 ③146×34+34×54 ④85×102 ⑤6000÷125÷8 ⑥672-36+64.
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①125×32×25, =125×(8×4)×25, =(125×8)×(4×25), =1000×100, =100000; ②32.62-2.25-3.75, =32.62-(2.25+3.75), =32.62-6, =26.62; ③146×34+34×54, =(146+54)×34, =200×34, =6800; ④85×102, =85×(100+2), =85×100+85×2, =8500+170, =8670; ⑤6000÷125÷8, =6000÷(125×8), =6000÷1000, =6; ⑥672-36+64, =636+64, =700. |
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