脱式计算(能简算的要简算)12.65-(3.65+8.5) 7.8+9+7.8 4.82-0.25+1.25+0.25 9.99-4.8 1.36+6.7
脱式计算(能简算的要简算)12.65-(3.65+8.5)7.8+9+7.84.82-0.25+1.25+0.259.99-4.81.36+6.7+4.31.36-1.3...
脱式计算(能简算的要简算)12.65-(3.65+8.5) 7.8+9+7.8 4.82-0.25+1.25+0.25 9.99-4.8 1.36+6.7+4.3 1.36-1.36+25.2.
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(1)12.65-(3.65+8.5) =12.65-3.65-8.5, =9-8.5, =0.5; (2)7.8+9+7.8 =16.8+7.8, =24.6; (3)4.82-0.25+1.25+0.25 =4.82+(1.25-0.25)+0.25, =4.82+1+0.25, =5.82+0.25, =6.07; (4)9.99-4.8=5.19; (5)1.36+6.7+4.3 =1.36+(6.7+4.3), =1.36+11, =12.36; (6)1.36-1.36+25.2 =0+25.2, =25.2. |
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